diff --git a/.github/workflows/release-ci.yml b/.github/workflows/release-ci.yml
new file mode 100644
index 0000000000000000000000000000000000000000..bdbaaec8eab1b2765bc7b8427518841597eaf93e
--- /dev/null
+++ b/.github/workflows/release-ci.yml
@@ -0,0 +1,42 @@
+name: Release CI
+on:
+  pull_request:
+    branches:
+    - master
+
+jobs:
+  check_version:
+    if: always()
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+    - run: |
+        MASTER_VERSION=$(git show origin/master:package.json | jq '.version')
+        THIS_VERSION=$(jq '.version' < package.json)
+        test "$MASTER_VERSION" == "$THIS_VERSION" && exit 1 || exit 0
+
+  check_release:
+    if: always()
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+    - run: |
+        VERSION_NUM=$(jq '.version' < package.json)
+        VERSION_NUM=${VERSION_NUM#\"}
+        VERSION_NUM=${VERSION_NUM%\"}
+        test -f docs/releases/v$VERSION_NUM.md && exit 0 || exit 1
+  
+  release_linked_mkdocs:
+    if: always()
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+    - run: |
+        VERSION_NUM=$(jq '.version' < package.json)
+        VERSION_NUM=${VERSION_NUM#\"} 
+        VERSION_NUM=${VERSION_NUM%\"} 
+        echo "VERSION_NUM: $VERSION_NUM"
+        cat mkdocs.yml
+        GREP_VERSION_NUM=$(cat mkdocs.yml | grep $VERSION_NUM)
+        echo GREP_VERSION_NUM: $GREP_VERSION_NUM
+        test -z "$GREP_VERSION_NUM" && exit 1 || exit 0
\ No newline at end of file
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index dc136836c17253be4056c83d497da3e3339fbc8c..e3766792780d1d42c25b17d98208b6193c286826 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -1,23 +1,26 @@
-name: '[release]'
-
-# on push to master, create release
+name: Release
 on:
-  push:
+  push: 
     branches:
-      - 'master'
+      - master
 
 jobs:
   check-version:
+    outputs:
+      package-version: ${{ steps.set-version.outputs.package-version-from-json }}
     runs-on: ubuntu-latest
     steps:
 
     - name: Checkout
       uses: actions/checkout@v1
-    - run: |
+    - name: Set version
+      id: set-version
+      run: |
         PACKAGEJSON_VER=v$(cat package.json | jq -r '.version')
-        echo 'PACKAGEJSON_VER='$PACKAGEJSON_VER >> $GITHUB_ENV
-
+        echo "::set-output name=package-version-from-json::$PACKAGEJSON_VER"
+      
   create-release:
+    needs: check-version
     if: success()
     runs-on: ubuntu-latest
     steps:
@@ -27,7 +30,7 @@ jobs:
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       with:
-        tag_name: ${{ env.PACKAGEJSON_VER }}
-        release_name: Release ${{ env.PACKAGEJSON_VER }}
+        tag_name: ${{ needs.check-version.outputs.package-version }}
+        release_name: Release ${{ needs.check-version.outputs.package-version }}
         draft: false
         prerelease: false
diff --git a/common/helpOnePager.md b/common/helpOnePager.md
index 35b4ff7191af002402aa57c576dae3e2f2c14cb6..f23b9a498e529d2cfc65b5856c0b313142f29448 100644
--- a/common/helpOnePager.md
+++ b/common/helpOnePager.md
@@ -10,7 +10,7 @@
 | Zoom | `[hover]` on any slice views, `[click]` magnifier |
 | Next slice | `<ctrl>` + `[mousewheel]` |
 | Next 10 slice | `<ctrl>` + `<shift>` + `[mousewheel]` |
-| Toggle delineation | |
+| Toggle delineation | `[q]` |
 
 ---
 
diff --git a/deploy/atlas/index.js b/deploy/atlas/index.js
index eb96d883cff1593df8dfd59cdeeae8b235567342..9bf745f2e071849efba3128ebb53f329bf44f27f 100644
--- a/deploy/atlas/index.js
+++ b/deploy/atlas/index.js
@@ -5,11 +5,12 @@ const path = require('path')
 const { detEncoding } = require('nomiseco')
 const { getAllAtlases, getAtlasById, isReady } = require('./query')
 const HOSTNAME = process.env.HOSTNAME || 'http://localhost:3000'
-
+const HOST_PATHNAME = process.env.HOST_PATHNAME || ''
 const { getTemplate } = require('../templates/query')
 const { getHandleErrorFn } = require('../util/streamHandleError')
 
-const getPreviewFn = ({ res, lastpart }) => HOSTNAME.replace(/\/$/, '') + '/' +
+const getPreviewFn = ({ res, lastpart }) => HOSTNAME.replace(/\/$/, '') + 
+  HOST_PATHNAME.replace(/\/$/, '') + '/' +
   (res.locals.routePathname
     ? url.resolve(`${res.locals.routePathname}/`, lastpart)
     : lastpart)
diff --git a/deploy/datasets/query.js b/deploy/datasets/query.js
index 47eef557694dbf01971ecd09d2bcf9a6eff81e60..1b4ce0d4c5d13479e6f59a05df634fa741b403d8 100644
--- a/deploy/datasets/query.js
+++ b/deploy/datasets/query.js
@@ -113,8 +113,11 @@ const getPublicDs = async () => {
   throw `cached Data not yet resolved, neither is get public ds defined`
 }
 
-
-const getDs = ({ user }) => (user
+/**
+ * force get only public ds
+ * getting individual ds is too slow
+ */
+const getDs = ({ user }) => (false && user
     ? fetchDatasetFromKg({ user }).then(({ results }) => results)
     : getPublicDs()
   ).then(async datasets => {
diff --git a/deploy/datasets/util.js b/deploy/datasets/util.js
index c5487ed6dfd5458a46d28dd32845b87b6d68becf..229b03891d1c0b498d734d017655d6a7127ad892 100644
--- a/deploy/datasets/util.js
+++ b/deploy/datasets/util.js
@@ -21,8 +21,9 @@ const getUserKGRequestParam = async ({ user }) => {
   let publicAccessToken
   /**
    * n.b. ACCESS_TOKEN env var is usually only set during dev
+   * user.type any other than 'hbp-oidc' (v1 of oidc) will result in timeout/error
    */
-  const accessToken = (user && user.tokenset && user.tokenset.access_token) || process.env.ACCESS_TOKEN
+  const accessToken = (user && user.type === 'hbp-oidc' && user.tokenset && user.tokenset.access_token) || process.env.ACCESS_TOKEN
   const releasedOnly = !accessToken
   if (!accessToken && getPublicAccessToken) {
     publicAccessToken = await getPublicAccessToken()
diff --git a/docs/releases/v2.3.0.md b/docs/releases/v2.3.0.md
index bd3c04a72e17891577f1027cb2da88d59d969b3d..2ffdd59932e3d4b2a5c66942f089ca30fa56717e 100644
--- a/docs/releases/v2.3.0.md
+++ b/docs/releases/v2.3.0.md
@@ -1,5 +1,7 @@
 # v2.3.0
 
+11 Dec 2020
+
 ## New features
 
 - update dataset preview functionality, allow the previewing of png
@@ -16,7 +18,7 @@
 - reworked regional dataset previews (iEEG & receptor density)
 - **experimental** : previewing of curated regional features: iEEG coordinates
 
-## Bugfixes:
+## Bugfixes
 
 - dataset list view explicitly show loading status
 - fixed a few typos
diff --git a/docs/releases/v2.3.1.md b/docs/releases/v2.3.1.md
new file mode 100644
index 0000000000000000000000000000000000000000..5517468d33961969d036e9c12430c69785a72975
--- /dev/null
+++ b/docs/releases/v2.3.1.md
@@ -0,0 +1,7 @@
+# v2.3.1
+
+## Bugfixes
+
+- fixes iEEG panel sometimes not loading spatial data (#816 #744)
+- fixes fetching of non-existent data when in big brain reference space (#817)
+- restore CI for staging/release
\ No newline at end of file
diff --git a/docs/releases/v2.3.2.md b/docs/releases/v2.3.2.md
new file mode 100644
index 0000000000000000000000000000000000000000..0280a2ddffcd34b46c6c14198f724f365477a734
--- /dev/null
+++ b/docs/releases/v2.3.2.md
@@ -0,0 +1,5 @@
+# v2.3.2
+
+## Bugfixes
+
+- change URL source for connectivity browser.
diff --git a/docs/releases/v2.3.3.md b/docs/releases/v2.3.3.md
new file mode 100644
index 0000000000000000000000000000000000000000..daf21d1b8a1090df33fa4ff89351285bf271ea1e
--- /dev/null
+++ b/docs/releases/v2.3.3.md
@@ -0,0 +1,6 @@
+# v2.3.3
+
+## Bugfixes
+
+- fix backwards compatibility with some URLs
+- fix bug where fetching of regional features does not complete for logged in users (#826). (the viewer will only fetch released datasets)
diff --git a/docs/releases/v2.3.4.md b/docs/releases/v2.3.4.md
new file mode 100644
index 0000000000000000000000000000000000000000..7874ad49313a9e874ae5b80787a9e25c10ef0a35
--- /dev/null
+++ b/docs/releases/v2.3.4.md
@@ -0,0 +1,5 @@
+# v2.3.4
+
+## Bugfixes
+
+- fix connectivity dataset external link
diff --git a/docs/releases/v2.3.5.md b/docs/releases/v2.3.5.md
new file mode 100644
index 0000000000000000000000000000000000000000..b066cc07a9f4cde4b1df3d98c236967287ab9d16
--- /dev/null
+++ b/docs/releases/v2.3.5.md
@@ -0,0 +1,6 @@
+# v2.3.5
+
+## Under the hood stuff
+
+- Temporarily disable Colin 27 template.
+- Update to JulichBrain v2.5
diff --git a/docs/releases/v2.3.6.md b/docs/releases/v2.3.6.md
new file mode 100644
index 0000000000000000000000000000000000000000..4249e5ba896565f7ab2c6f3bac6e965ea3629201
--- /dev/null
+++ b/docs/releases/v2.3.6.md
@@ -0,0 +1,5 @@
+# v2.3.6
+
+## Bugfixes
+
+- fix backwards compatibility with some URLs
\ No newline at end of file
diff --git a/docs/releases/v2.3.7.md b/docs/releases/v2.3.7.md
new file mode 100644
index 0000000000000000000000000000000000000000..ad4b523b115c3ff80f37fe14df676e899cc13933
--- /dev/null
+++ b/docs/releases/v2.3.7.md
@@ -0,0 +1,5 @@
+# v2.3.7
+
+## Under the hood stuff
+
+- Enable CI for release workflow.
diff --git a/docs/releases/v2.3.8.md b/docs/releases/v2.3.8.md
new file mode 100644
index 0000000000000000000000000000000000000000..9a10601b60180d727fc0e1b0fa9e91314df882c4
--- /dev/null
+++ b/docs/releases/v2.3.8.md
@@ -0,0 +1,5 @@
+# v2.3.8
+
+## New Features
+
+- Adding control allowing delineation control
\ No newline at end of file
diff --git a/docs/releases/v2.3.9.md b/docs/releases/v2.3.9.md
new file mode 100644
index 0000000000000000000000000000000000000000..510ef7cf02181199f427e52b6c65a1d425dbab4d
--- /dev/null
+++ b/docs/releases/v2.3.9.md
@@ -0,0 +1,5 @@
+# v2.3.9
+
+## Bugfixes
+
+- Explore in other templates sometimes bugs out.
\ No newline at end of file
diff --git a/docs/releases/v2.4.0.md b/docs/releases/v2.4.0.md
index d10152cc2e9b0d91fb59a774864db361172c286c..8bae0f274f49d9690cc13820501a925945794a43 100644
--- a/docs/releases/v2.4.0.md
+++ b/docs/releases/v2.4.0.md
@@ -12,6 +12,7 @@
 - only top level mesh(es) will be loaded (#890). This should drastically improve atlases with hierarchical surface meshes (e.g. Allen CCF v3).
 - Preliminary support for displaying of SWC (#907)
 - Preliminary support for freesurfer (#900)
+- Allow for finer controls over meshes display (#883, #470)
 
 ## Under the hood stuff
 
diff --git a/e2e/src/advanced/urlParsing.prod.e2e-spec.js b/e2e/src/advanced/urlParsing.prod.e2e-spec.js
index 832da7bc2f04294e37b033bef18d74b609efec10..7e239a89d51b86fd02e0fd8e31466e1af18482e5 100644
--- a/e2e/src/advanced/urlParsing.prod.e2e-spec.js
+++ b/e2e/src/advanced/urlParsing.prod.e2e-spec.js
@@ -70,8 +70,23 @@ describe('> url parsing', () => {
     expect(red).toEqual(blue)
   })
 
+  it('> [bkwards compat] if ill defined labelIndex for regionsSelected are defined, should handle gracefully', async () => {
+    const url = '/?parcellationSelected=JuBrain+Cytoarchitectonic+Atlas&templateSelected=MNI+Colin+27&navigation=0_0_0_1__-0.2753947079181671_0.6631333827972412_-0.6360703706741333_0.2825356423854828__3000000__-17800000_-6700000_-7500000__200000&regionsSelected=142&niftiLayers=https%3A%2F%2Fneuroglancer.humanbrainproject.org%2Fprecomputed%2FJuBrain%2Fv2.2c%2FPMaps%2FBforebrain_4.nii'
+    await iavPage.goto(url)
+    await iavPage.clearAlerts()
+    await iavPage.wait(5000)
+    await iavPage.waitForAsync()
+    const log = await iavPage.getLog()
+    const filteredLog = log.filter(({ message }) => !/Access-Control-Allow-Origin/.test(message))
+
+    // expecting some errors in the console. In catastrophic event, there will most likely be looped errors (on each render cycle)
+    expect(
+      filteredLog.length
+    ).toBeLessThan(50)
+  })
+
   it('> if niftiLayers are defined, parcellation layer should be hidden', async () => {
-    const url = `/?templateSelected=MNI+152+ICBM+2009c+Nonlinear+Asymmetric&parcellationSelected=JuBrain+Cytoarchitectonic+Atlas&niftiLayers=https%3A%2F%2Fneuroglancer.humanbrainproject.eu%2Fprecomputed%2FJuBrain%2F17%2Ficbm152casym%2Fpmaps%2FVisual_hOc1_r_N10_nlin2MNI152ASYM2009C_2.4_publicP_a48ca5d938781ebaf1eaa25f59df74d0.nii.gz`
+    const url = `/?parcellationSelected=JuBrain+Cytoarchitectonic+Atlas&templateSelected=MNI+Colin+27&navigation=0_0_0_1__-0.2753947079181671_0.6631333827972412_-0.6360703706741333_0.2825356423854828__3000000__-17800000_-6700000_-7500000__200000&regionsSelected=142&niftiLayers=https%3A%2F%2Fneuroglancer.humanbrainproject.org%2Fprecomputed%2FJuBrain%2Fv2.2c%2FPMaps%2FBforebrain_4.nii`
     await iavPage.goto(url)
     await iavPage.clearAlerts()
 
@@ -121,38 +136,4 @@ describe('> url parsing', () => {
     ))
   })
 
-  /**
-   * encoding of dataset previews in url is current not enabled
-   */
-  it('> if datasetPreview is set, should load with previews', 
-  // async () => {
-  //   const url = `http://localhost:3000/?templateSelected=MNI+152+ICBM+2009c+Nonlinear+Asymmetric&parcellationSelected=JuBrain+Cytoarchitectonic+Atlas&previewingDatasetFiles=%5B%7B%22datasetId%22%3A%22e715e1f7-2079-45c4-a67f-f76b102acfce%22%2C%22filename%22%3A%22fingerprint%22%7D%2C%7B%22datasetId%22%3A%22e715e1f7-2079-45c4-a67f-f76b102acfce%22%2C%22filename%22%3A%22GABA%E1%B4%80%28BZ%29%2Fautoradiography%22%7D%2C%7B%22datasetId%22%3A%22e715e1f7-2079-45c4-a67f-f76b102acfce%22%2C%22filename%22%3A%22GABA%E1%B4%80%28BZ%29%2Fprofile%22%7D%5D`
-  //   const datasetPreview = [
-  //     {
-  //       "datasetId": "e715e1f7-2079-45c4-a67f-f76b102acfce",
-  //       "filename": "fingerprint"
-  //     },
-  //     {
-  //       "datasetId": "e715e1f7-2079-45c4-a67f-f76b102acfce",
-  //       "filename": "GABAá´€(BZ)/autoradiography"
-  //     },
-  //     {
-  //       "datasetId": "e715e1f7-2079-45c4-a67f-f76b102acfce",
-  //       "filename": "GABAá´€(BZ)/profile"
-  //     }
-  //   ]
-
-  //   const searchParam = new URLSearchParams()
-
-  //   searchParam.set('templateSelected', 'MNI 152 ICBM 2009c Nonlinear Asymmetric')
-  //   searchParam.set('parcellationSelected', 'JuBrain Cytoarchitectonic Atlas')
-  //   searchParam.set('previewingDatasetFiles', JSON.stringify(datasetPreview))
-  //   await iavPage.goto(`/?${searchParam.toString()}`)
-
-  //   const visibleArr = await iavPage.areVisible(`[aria-label="${ARIA_LABELS.DATASET_FILE_PREVIEW}"]`)
-  //   expect(visibleArr.length).toEqual(3)
-  //   expect(visibleArr).toEqual([true, true, true])
-  // }
-  
-  )
 })
diff --git a/e2e/util/selenium/base.js b/e2e/util/selenium/base.js
index e16f7465664396a0cad688e34e81e7a197f8ccdd..88312daf3cd2eadb52f2b47a390e9d1e6d33c89b 100644
--- a/e2e/util/selenium/base.js
+++ b/e2e/util/selenium/base.js
@@ -99,6 +99,11 @@ class WdBase{
     return result
   }
 
+  async getLog() {
+    const browserLog = await this._browser.manage().logs().get('browser')
+    return browserLog
+  }
+
   async getRgbAt({ position } = {}, cssSelector = null){
     if (!position) throw new Error(`position is required for getRgbAt`)
     const { x, y } = verifyPosition(position)
diff --git a/mkdocs.yml b/mkdocs.yml
index 02d1d42676e5cae500b176d9800c6c1eacef7574..cf071e557a17313d0771db193adeebe6258c0aa7 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -41,6 +41,15 @@ pages:
     - Display non-atlas volumes: 'advanced/otherVolumes.md'
   - Release notes:
     - v2.4.0: 'releases/v2.4.0.md'
+    - v2.3.9: 'releases/v2.3.9.md'
+    - v2.3.8: 'releases/v2.3.8.md'
+    - v2.3.7: 'releases/v2.3.7.md'
+    - v2.3.6: 'releases/v2.3.6.md'
+    - v2.3.5: 'releases/v2.3.5.md'
+    - v2.3.4: 'releases/v2.3.4.md'
+    - v2.3.3: 'releases/v2.3.3.md'
+    - v2.3.2: 'releases/v2.3.2.md'
+    - v2.3.1: 'releases/v2.3.1.md'
     - v2.3.0: 'releases/v2.3.0.md'
     - v2.2.7: 'releases/v2.2.7.md'
     - v2.2.6: 'releases/v2.2.6.md'
@@ -61,4 +70,4 @@ pages:
     - v0.2.9: 'releases/v0.2.9.md'
     - v0.2.0: 'releases/v0.2.0.md'
     - v0.1.0: 'releases/v0.1.0.md'
-    - legacy: 'releases/legacy.md'
\ No newline at end of file
+    - legacy: 'releases/legacy.md'
diff --git a/package.json b/package.json
index bd788abf8094f1783038d06b4e2683c79ab96ac9..94e9b5e53d806f06f32a25921c0f1f2120283280 100644
--- a/package.json
+++ b/package.json
@@ -80,7 +80,7 @@
     "@ngrx/effects": "^9.1.1",
     "@ngrx/store": "^9.1.1",
     "@types/node": "12.12.39",
-    "export-nehuba": "0.0.7",
+    "export-nehuba": "0.0.8",
     "hbp-connectivity-component": "^0.3.18",
     "zone.js": "^0.10.2"
   }
diff --git a/src/atlasComponents/connectivity/connectivityBrowser/connectivityBrowser.component.spec.ts b/src/atlasComponents/connectivity/connectivityBrowser/connectivityBrowser.component.spec.ts
new file mode 100644
index 0000000000000000000000000000000000000000..5c46a0f721a4991140e75f3bd41b4fcdc48dbeb4
--- /dev/null
+++ b/src/atlasComponents/connectivity/connectivityBrowser/connectivityBrowser.component.spec.ts
@@ -0,0 +1,108 @@
+import {ConnectivityBrowserComponent} from "./connectivityBrowser.component";
+import {async, ComponentFixture, TestBed} from "@angular/core/testing";
+import {Action} from "@ngrx/store";
+import {HttpClientModule} from "@angular/common/http";
+import {CUSTOM_ELEMENTS_SCHEMA, Directive, Input} from "@angular/core";
+import {provideMockActions} from "@ngrx/effects/testing";
+import {MockStore, provideMockStore} from "@ngrx/store/testing";
+import {Observable, of} from "rxjs";
+import { viewerStateAllRegionsFlattenedRegionSelector, viewerStateOverwrittenColorMapSelector } from "src/services/state/viewerState/selectors";
+import { ngViewerSelectorClearViewEntries } from "src/services/state/ngViewerState.store.helper";
+
+/**
+ * injecting databrowser module is bad idea
+ * since it relies on its own selectors
+ * since the only reason why data browser is imported is to use show dataset dialogue
+ * just use a dummy directive
+ */
+
+@Directive({
+    selector: '[iav-dataset-show-dataset-dialog]'
+})
+
+class DummyDirective{
+    @Input('iav-dataset-show-dataset-dialog-name')
+    name: string
+    @Input('iav-dataset-show-dataset-dialog-description')
+    description: string
+    @Input('iav-dataset-show-dataset-dialog-kgid')
+    kgId: string
+    @Input('iav-dataset-show-dataset-dialog-kgschema')
+    kgSchema: string
+}
+
+describe('ConnectivityComponent', () => {
+
+    let component: ConnectivityBrowserComponent;
+    let fixture: ComponentFixture<ConnectivityBrowserComponent>;
+    const actions$: Observable<Action> = of({type: 'TEST'})
+
+    let datasetList = [
+        {
+            id: 'id1',
+            name: 'n1',
+            description: 'd1',
+            kgId: 'kgId1',
+            kgschema: 'kgschema1'
+        }, {
+            id: 'id2',
+            name: 'n2',
+            description: 'd2',
+            kgId: 'kgId2',
+            kgschema: 'kgschema2'
+        }
+    ]
+
+    beforeEach(async (() => {
+        TestBed.configureTestingModule({
+            imports: [
+                HttpClientModule,
+            ],
+            providers: [
+                provideMockActions(() => actions$),
+                provideMockStore()
+            ],
+            declarations: [
+                ConnectivityBrowserComponent,
+                DummyDirective,
+            ],
+            schemas: [
+                CUSTOM_ELEMENTS_SCHEMA,
+            ],
+        }).compileComponents()
+
+    }));
+
+    beforeEach(() => {
+        const mockStore = TestBed.inject(MockStore)
+        mockStore.overrideSelector(viewerStateAllRegionsFlattenedRegionSelector, [])
+        mockStore.overrideSelector(viewerStateOverwrittenColorMapSelector, null)
+        mockStore.overrideSelector(ngViewerSelectorClearViewEntries, [])
+    })
+
+    it('> component can be created', async () => {
+        fixture = TestBed.createComponent(ConnectivityBrowserComponent)
+        component = fixture.componentInstance
+        expect(component).toBeTruthy()
+    })
+
+    it('> change dataset changes description, kgId and kgschema', () => {
+        fixture = TestBed.createComponent(ConnectivityBrowserComponent)
+        component = fixture.componentInstance
+
+        component.datasetList = datasetList
+
+        component.changeDataset({value: 'n1'})
+
+        expect(component.selectedDatasetDescription).toEqual('d1')
+        expect(component.selectedDatasetKgId).toEqual('kgId1')
+        expect(component.selectedDatasetKgSchema).toEqual('kgschema1')
+
+        component.changeDataset({value: 'n2'})
+
+        expect(component.selectedDatasetDescription).toEqual('d2')
+        expect(component.selectedDatasetKgId).toEqual('kgId2')
+        expect(component.selectedDatasetKgSchema).toEqual('kgschema2')
+    })
+
+});
\ No newline at end of file
diff --git a/src/atlasComponents/connectivity/connectivityBrowser/connectivityBrowser.component.ts b/src/atlasComponents/connectivity/connectivityBrowser/connectivityBrowser.component.ts
index d9764a702610d555906f45360e715f017849543b..7be783d314f81b62d69045d3cdc75538205acc30 100644
--- a/src/atlasComponents/connectivity/connectivityBrowser/connectivityBrowser.component.ts
+++ b/src/atlasComponents/connectivity/connectivityBrowser/connectivityBrowser.component.ts
@@ -12,15 +12,9 @@ import {
 import {select, Store} from "@ngrx/store";
 import {fromEvent, Observable, Subscription, Subject, combineLatest} from "rxjs";
 import {distinctUntilChanged, filter, map} from "rxjs/operators";
-import {
-  CLEAR_CONNECTIVITY_REGION,
-  SELECT_REGIONS,
-  SET_OVERWRITTEN_COLOR_MAP
-} from "src/services/state/viewerState.store";
-import {safeFilter} from "src/services/stateStore.service";
-import {viewerStateNavigateToRegion} from "src/services/state/viewerState.store.helper";
-import {ngViewerActionClearView} from "src/services/state/ngViewerState/actions";
-import {ngViewerSelectorClearViewEntries} from "src/services/state/ngViewerState/selectors";
+
+import { viewerStateNavigateToRegion, viewerStateSetSelectedRegions } from "src/services/state/viewerState.store.helper";
+import { ngViewerSelectorClearViewEntries, ngViewerActionClearView } from "src/services/state/ngViewerState.store.helper";
 import {
   viewerStateAllRegionsFlattenedRegionSelector,
   viewerStateOverwrittenColorMapSelector
@@ -44,7 +38,7 @@ export class ConnectivityBrowserComponent implements OnInit, AfterViewInit, OnDe
      */
     private _isFirstUpdate = true
 
-    public connectivityUrl = 'https://connectivity-query-v1-1-connectivity.apps-dev.hbp.eu/v1.1/studies'
+    public connectivityUrl = 'https://connectivity-query-v1-1-connectivity.apps.hbp.eu/v1.1/studies'
 
     private accordionIsExpanded = false
 
@@ -66,7 +60,7 @@ export class ConnectivityBrowserComponent implements OnInit, AfterViewInit, OnDe
         })
       )
       this.store$.dispatch({
-        type: SET_OVERWRITTEN_COLOR_MAP,
+        type: 'SET_OVERWRITTEN_COLOR_MAP',
         payload: flag? CONNECTIVITY_NAME_PLATE : false,
       })
     }
@@ -88,7 +82,7 @@ export class ConnectivityBrowserComponent implements OnInit, AfterViewInit, OnDe
 
       if (!val) {
         this.store$.dispatch({
-          type: SET_OVERWRITTEN_COLOR_MAP,
+          type: 'SET_OVERWRITTEN_COLOR_MAP',
           payload: false,
         })
         return
@@ -115,6 +109,8 @@ export class ConnectivityBrowserComponent implements OnInit, AfterViewInit, OnDe
     public datasetList: any[] = []
     public selectedDataset: any
     public selectedDatasetDescription: string = ''
+    public selectedDatasetKgId: string = ''
+    public selectedDatasetKgSchema: string = ''
     public connectedAreas = []
 
     private selectedParcellationFlatRegions$ = this.store$.pipe(
@@ -139,9 +135,7 @@ export class ConnectivityBrowserComponent implements OnInit, AfterViewInit, OnDe
     ) {
 
       this.overwrittenColorMap$ = this.store$.pipe(
-        select('viewerState'),
-        safeFilter('overwrittenColorMap'),
-        map(state => state.overwrittenColorMap),
+        select(viewerStateOverwrittenColorMapSelector),
         distinctUntilChanged()
       )
     }
@@ -239,19 +233,14 @@ export class ConnectivityBrowserComponent implements OnInit, AfterViewInit, OnDe
             if (flag) {
               this.addNewColorMap()
               this.store$.dispatch({
-                type: SET_OVERWRITTEN_COLOR_MAP,
+                type: 'SET_OVERWRITTEN_COLOR_MAP',
                 payload: 'connectivity',
               })
             } else {
               this.restoreDefaultColormap()
 
-              this.store$.dispatch({type: SET_OVERWRITTEN_COLOR_MAP, payload: null})
+              this.store$.dispatch({type: 'SET_OVERWRITTEN_COLOR_MAP', payload: null})
 
-              /**
-                         * TODO
-                         * may no longer be necessary
-                         */
-              this.store$.dispatch({type: CLEAR_CONNECTIVITY_REGION})
             }
           }
         })
@@ -304,7 +293,10 @@ export class ConnectivityBrowserComponent implements OnInit, AfterViewInit, OnDe
     changeDataset(event = null) {
       if (event) {
         this.selectedDataset = event.value
-        this.selectedDatasetDescription = this.datasetList.find(d => d.name === this.selectedDataset).description
+        const foundDataset = this.datasetList.find(d => d.name === this.selectedDataset)
+        this.selectedDatasetDescription = foundDataset?.description
+        this.selectedDatasetKgId = foundDataset?.kgId || null
+        this.selectedDatasetKgSchema = foundDataset?.kgschema || null
       }
       if (this.datasetList.length && this.selectedDataset) {
         const selectedDatasetId = this.datasetList.find(d => d.name === this.selectedDataset).id
@@ -325,10 +317,11 @@ export class ConnectivityBrowserComponent implements OnInit, AfterViewInit, OnDe
     }
 
     selectRegion(region) {
-      this.store$.dispatch({
-        type: SELECT_REGIONS,
-        selectRegions: [region],
-      })
+      this.store$.dispatch(
+        viewerStateSetSelectedRegions({
+          selectRegions: [ region ]
+        })
+      )
     }
 
     getRegionWithName(region) {
@@ -407,7 +400,7 @@ export class ConnectivityBrowserComponent implements OnInit, AfterViewInit, OnDe
     }
 
     public exportFullConnectivity() {
-      this.fullConnectivityGridElement.nativeElement['downloadCSV']()
+      this.fullConnectivityGridElement?.nativeElement['downloadCSV']()
     }
 
 }
diff --git a/src/atlasComponents/connectivity/connectivityBrowser/connectivityBrowser.template.html b/src/atlasComponents/connectivity/connectivityBrowser/connectivityBrowser.template.html
index fa47192a66062082a8d29c557871a35bb6726a49..178cab32f593d5eb1690fcd46c89ab1cb44b4ea5 100644
--- a/src/atlasComponents/connectivity/connectivityBrowser/connectivityBrowser.template.html
+++ b/src/atlasComponents/connectivity/connectivityBrowser/connectivityBrowser.template.html
@@ -39,7 +39,10 @@
                     <button class="flex-grow-0 flex-shrink-0" mat-icon-button
                             iav-dataset-show-dataset-dialog
                             [iav-dataset-show-dataset-dialog-name]="selectedDataset"
-                            [iav-dataset-show-dataset-dialog-description]="selectedDatasetDescription">
+                            [iav-dataset-show-dataset-dialog-description]="selectedDatasetDescription"
+                            [iav-dataset-show-dataset-dialog-kgid]="selectedDatasetKgId? selectedDatasetKgId : null"
+                            [iav-dataset-show-dataset-dialog-kgschema]="selectedDatasetKgSchema? selectedDatasetKgSchema : null"
+                            >
                         <i class="fas fa-info"></i>
                     </button>
                     <button class="flex-grow-0 flex-shrink-0"
diff --git a/src/atlasComponents/databrowserModule/singleDataset/sideNavView/sDsSideNavView.template.html b/src/atlasComponents/databrowserModule/singleDataset/sideNavView/sDsSideNavView.template.html
index 78daaefedf86e26108902a5d0004084cfc6e3245..455219a1825c31e207e94e6ea46a36774c6871ad 100644
--- a/src/atlasComponents/databrowserModule/singleDataset/sideNavView/sDsSideNavView.template.html
+++ b/src/atlasComponents/databrowserModule/singleDataset/sideNavView/sDsSideNavView.template.html
@@ -135,7 +135,8 @@
             <ng-template [ngIf]="matExpansionPanel.expanded">
               <feature-container
                 [feature]="feature"
-                [region]="region$ | async">
+                [region]="region$ | async"
+                (viewChanged)="detectChange()">
               </feature-container>
             </ng-template>
           </mat-expansion-panel>
diff --git a/src/atlasComponents/parcellationRegion/region.base.spec.ts b/src/atlasComponents/parcellationRegion/region.base.spec.ts
index 93899584dd99b1fbc99d994e0432e280263087bd..712e323298045aa049c7e8e2961fbb58480f9be2 100644
--- a/src/atlasComponents/parcellationRegion/region.base.spec.ts
+++ b/src/atlasComponents/parcellationRegion/region.base.spec.ts
@@ -1,5 +1,6 @@
 import { TestBed } from '@angular/core/testing'
 import { MockStore, provideMockStore } from '@ngrx/store/testing'
+import { viewerStateNewViewer } from 'src/services/state/viewerState/actions'
 import { RegionBase, regionInOtherTemplateSelector, getRegionParentParcRefSpace } from './region.base'
 const  util = require('common/util')
 
@@ -329,16 +330,22 @@ const getRegionInOtherTemplateSelectorBundle = (version: EnumParcRegVersion) =>
 describe('> region.base.ts', () => {
   describe('> regionInOtherTemplateSelector', () => {
 
+    // TODO
+    it('> only selects region in the template specified by selected atlas')
+
     for (const enumKey of Object.keys(EnumParcRegVersion)) {
       describe(`> selector version for ${enumKey}`, () => {
 
         const { mockFetchedTemplates, mr0, mt2, mt0, mp0, mt1, mp1h, mr0lh, mt3, mr0rh } = getRegionInOtherTemplateSelectorBundle(enumKey as EnumParcRegVersion)
 
+        let selectedAtlas = {
+          templateSpaces: mockFetchedTemplates
+        }
         describe('> no hemisphere selected, simulates big brain cyto map', () => {
   
           let result: any[]
           beforeAll(() => {
-            result = regionInOtherTemplateSelector.projector(mockFetchedTemplates, mt0, { region: mr0 })
+            result = regionInOtherTemplateSelector.projector(selectedAtlas, mockFetchedTemplates, mt0, { region: mr0 })
           })
     
           it('> length checks out', () => {
@@ -410,7 +417,7 @@ describe('> region.base.ts', () => {
         describe('> hemisphere data selected (left hemisphere), simulates julich-brain in mni152', () => {
           let result
           beforeAll(() => {
-            result = regionInOtherTemplateSelector.projector(mockFetchedTemplates, mt2, { region: mr0lh })
+            result = regionInOtherTemplateSelector.projector(selectedAtlas, mockFetchedTemplates, mt2, { region: mr0lh })
           })
     
           it('> length checks out', () => {
@@ -444,19 +451,20 @@ describe('> region.base.ts', () => {
   })
   
   describe('> RegionBase', () => {
+    let regionBase: RegionBase
+    let mockStore: MockStore
     beforeEach(() => {
       TestBed.configureTestingModule({
         providers: [
           provideMockStore()
         ]
       })
+      mockStore = TestBed.inject(MockStore)
+      mockStore.overrideSelector(regionInOtherTemplateSelector, [])
+      mockStore.overrideSelector(getRegionParentParcRefSpace, { template: null, parcellation: null })
     })
     describe('> position', () => {
-      let regionBase: RegionBase
       beforeEach(() => {
-        const mockStore = TestBed.inject(MockStore)
-        mockStore.overrideSelector(regionInOtherTemplateSelector, [])
-        mockStore.overrideSelector(getRegionParentParcRefSpace, { template: null, parcellation: null })
         regionBase = new RegionBase(mockStore)
       })
       it('> does not populate if position property is absent', () => {
@@ -609,7 +617,85 @@ describe('> region.base.ts', () => {
             regionBase.rgbString
           ).toEqual(`rgb(255,200,200)`)
         })
+      })
+    })
+    describe('> changeView', () => {
+      const fakeTmpl = {
+        name: 'fakeTmpl'
+      }
+      const fakeParc = {
+        name: 'fakeParc'
+      }
+      beforeEach(() => {
+        regionBase = new RegionBase(mockStore)
+      })
+
+      describe('> if sameRegion has position attribute', () => {
+        let dispatchSpy: jasmine.Spy
+
+        beforeEach(() => {
+          dispatchSpy = spyOn(mockStore, 'dispatch')
+        })
+        afterEach(() => {
+          dispatchSpy.calls.reset()
+        })
+        it('> malformed position is not an array > do not pass position', () => {
 
+          regionBase.changeView({
+            template: fakeTmpl,
+            parcellation: fakeParc,
+            region: {
+              position: 'hello wolrd'
+            }
+          })
+
+          expect(dispatchSpy).toHaveBeenCalledWith(
+            viewerStateNewViewer({
+              selectTemplate: fakeTmpl,
+              selectParcellation: fakeParc,
+              navigation: {}
+            })
+          )
+        })
+
+        it('> malformed position is an array of incorrect size > do not pass position', () => {
+
+          regionBase.changeView({
+            template: fakeTmpl,
+            parcellation: fakeParc,
+            region: {
+              position: []
+            }
+          })
+
+          expect(dispatchSpy).toHaveBeenCalledWith(
+            viewerStateNewViewer({
+              selectTemplate: fakeTmpl,
+              selectParcellation: fakeParc,
+              navigation: {}
+            })
+          )
+        })
+
+        it('> correct position > pass position', () => {
+          regionBase.changeView({
+            template: fakeTmpl,
+            parcellation: fakeParc,
+            region: {
+              position: [1,2,3]
+            }
+          })
+
+          expect(dispatchSpy).toHaveBeenCalledWith(
+            viewerStateNewViewer({
+              selectTemplate: fakeTmpl,
+              selectParcellation: fakeParc,
+              navigation: {
+                position: [1,2,3]
+              }
+            })
+          )
+        })
       })
     })
   })
diff --git a/src/atlasComponents/parcellationRegion/region.base.ts b/src/atlasComponents/parcellationRegion/region.base.ts
index 68b83999af0e147d48eaf7fc7a2bab91e13c67db..33f84531de4c0bcc599b53542d8c5209ccd9f8e7 100644
--- a/src/atlasComponents/parcellationRegion/region.base.ts
+++ b/src/atlasComponents/parcellationRegion/region.base.ts
@@ -173,6 +173,9 @@ export class RegionBase {
       region
     } = sameRegion
     const { position } = region
+    const navigation = Array.isArray(position) && position.length === 3
+      ? { position }
+      : {  }
     this.closeRegionMenu.emit()
 
     /**
@@ -182,9 +185,7 @@ export class RegionBase {
     this.store$.dispatch(viewerStateNewViewer ({
       selectTemplate: template,
       selectParcellation: parcellation,
-      navigation: {
-        position
-      },
+      navigation,
     }))
   }
 
@@ -261,9 +262,11 @@ export class RenderViewOriginDatasetLabelPipe implements PipeTransform{
 }
 
 export const regionInOtherTemplateSelector = createSelector(
+  viewerStateGetSelectedAtlas,
   viewerStateFetchedTemplatesSelector,
   viewerStateSelectedTemplateSelector,
-  (fetchedTemplates, templateSelected, prop) => {
+  (atlas, fetchedTemplates, templateSelected, prop) => {
+    const atlasTemplateSpacesIds = atlas.templateSpaces.map(({ ['@id']: id, fullId }) => id || fullId)
     const { region: regionOfInterest } = prop
     const returnArr = []
 
@@ -272,7 +275,13 @@ export const regionInOtherTemplateSelector = createSelector(
     const regionOfInterestId = getIdFromFullId(regionOfInterest.fullId)
     if (!templateSelected) return []
     const selectedTemplateId = getIdFromFullId(templateSelected.fullId)
-    const otherTemplates = fetchedTemplates.filter(({ fullId }) => getIdFromFullId(fullId) !== selectedTemplateId)
+
+    // need to ensure that the templates are defined in atlas definition
+    // atlas is the single source of truth 
+    
+    const otherTemplates = fetchedTemplates
+      .filter(({ fullId }) => getIdFromFullId(fullId) !== selectedTemplateId)
+      .filter(({ ['@id']: id, fullId }) => atlasTemplateSpacesIds.includes(id || fullId))
     for (const template of otherTemplates) {
       for (const parcellation of template.parcellations) {
         const flattenedRegions = flattenRegions(parcellation.regions)
diff --git a/src/atlasComponents/regionalFeatures/featureContainer/featureContainer.component.spec.ts b/src/atlasComponents/regionalFeatures/featureContainer/featureContainer.component.spec.ts
new file mode 100644
index 0000000000000000000000000000000000000000..627b097c977eb8fbef6171fb205a0b6f690abd6e
--- /dev/null
+++ b/src/atlasComponents/regionalFeatures/featureContainer/featureContainer.component.spec.ts
@@ -0,0 +1,169 @@
+import { CommonModule } from "@angular/common"
+import { ChangeDetectorRef, Component, ComponentRef, EventEmitter, NgModule } from "@angular/core"
+import { async, TestBed } from "@angular/core/testing"
+import { By } from "@angular/platform-browser"
+import { RegionalFeaturesService } from "../regionalFeature.service"
+import { ISingleFeature } from "../singleFeatures/interfaces"
+import { FeatureContainer } from "./featureContainer.component"
+
+const dummyCmpType = 'dummyType'
+
+@Component({
+  template: `{{ text }}`
+})
+
+class DummyComponent implements ISingleFeature{
+  text = 'hello world'
+  feature: any
+  region: any
+  viewChanged = new EventEmitter<boolean>()
+}
+
+@Component({
+  template: ''
+})
+
+class HostCmp{
+  public feature: any
+  public region: any
+
+  constructor(public cdr: ChangeDetectorRef){
+
+  }
+
+  detectChange(){
+    this.cdr.detectChanges()
+  }
+}
+
+const serviceStub = {
+  mapFeatToCmp: new Map([
+    [dummyCmpType, DummyComponent]
+  ])
+}
+
+@NgModule({
+  declarations: [
+    FeatureContainer,
+    DummyComponent,
+  ],
+  entryComponents: [
+    DummyComponent
+  ],
+  providers: [
+    {
+      provide: RegionalFeaturesService,
+      useValue: serviceStub
+    }
+  ],
+  exports: [
+    FeatureContainer,
+    DummyComponent,
+  ]
+})
+
+class DummyModule{}
+
+describe('> featureContainer.component.ts', () => {
+  describe('> FeatureContainer', () => {
+
+    beforeEach(async(() => {
+      TestBed.configureTestingModule({
+        imports: [
+          CommonModule,
+          DummyModule,
+        ],
+        declarations: [
+          HostCmp,
+        ],
+      }).overrideComponent(HostCmp, {
+        set: {
+          template: `
+          <feature-container
+            [feature]="feature"
+            [region]="region"
+            (viewChanged)="detectChange()">
+          </feature-container>`
+        }
+      }).compileComponents()
+
+    }))
+
+    it('> can be created', () => {
+      const fixture = TestBed.createComponent(HostCmp)
+      expect(fixture).toBeTruthy()
+      const featContainer = fixture.debugElement.query(By.directive(FeatureContainer))
+      expect(featContainer).toBeTruthy()
+    })
+
+    describe('> if inputs change', () => {
+      it('> if input changed, but feature is not one of them, map.get will not be called', () => {
+        const fixture = TestBed.createComponent(HostCmp)
+        // const featContainer = fixture.debugElement.query(By.directive(FeatureContainer))
+        spyOn(serviceStub.mapFeatToCmp, 'get').and.callThrough()
+        fixture.componentInstance.region = {
+          name: 'tesla'
+        }
+        fixture.detectChanges()
+        expect(serviceStub.mapFeatToCmp.get).not.toHaveBeenCalled()
+      })
+
+      it('> if input changed, feature is one of them, will not call map.get', () => {
+        const fixture = TestBed.createComponent(HostCmp)
+        const dummyFeature = {
+          type: dummyCmpType
+        }
+        spyOn(serviceStub.mapFeatToCmp, 'get').and.callThrough()
+        fixture.componentInstance.feature = dummyFeature
+        fixture.detectChanges()
+        expect(serviceStub.mapFeatToCmp.get).toHaveBeenCalledWith(dummyCmpType)
+      })
+
+      it('> should render default txt', () => {
+        const fixture = TestBed.createComponent(HostCmp)
+        const dummyFeature = {
+          type: dummyCmpType
+        }
+        fixture.componentInstance.feature = dummyFeature
+        fixture.detectChanges()
+        const text = fixture.nativeElement.textContent
+        expect(text).toContain('hello world')
+      })
+
+      it('> if inner component changes, if view changed does not emit, will not change ui', () => {
+
+        const fixture = TestBed.createComponent(HostCmp)
+        const dummyFeature = {
+          type: dummyCmpType
+        }
+        fixture.componentInstance.feature = dummyFeature
+        fixture.detectChanges()
+        const featureContainer = fixture.debugElement.query(
+          By.directive(FeatureContainer)
+        )
+        const cr = (featureContainer.componentInstance as FeatureContainer)['cr'] as ComponentRef<DummyComponent>
+        cr.instance.text = 'foo bar'
+        const text = fixture.nativeElement.textContent
+        expect(text).toContain('hello world')
+      })
+
+      it('> if inner component changes, and viewChanged is emitted, ui should change accordingly', () => {
+
+        const fixture = TestBed.createComponent(HostCmp)
+        const dummyFeature = {
+          type: dummyCmpType
+        }
+        fixture.componentInstance.feature = dummyFeature
+        fixture.detectChanges()
+        const featureContainer = fixture.debugElement.query(
+          By.directive(FeatureContainer)
+        )
+        const cr = (featureContainer.componentInstance as FeatureContainer)['cr'] as ComponentRef<DummyComponent>
+        cr.instance.text = 'foo bar'
+        cr.instance.viewChanged.emit(true)
+        const text = fixture.nativeElement.textContent
+        expect(text).toContain('foo bar')
+      })
+    })
+  })
+})
diff --git a/src/atlasComponents/regionalFeatures/featureContainer/featureContainer.component.ts b/src/atlasComponents/regionalFeatures/featureContainer/featureContainer.component.ts
index d6752dae47b53d81f94c067ff653366f59c1a375..2b2391599494ac22cadc250fa479255fa39d2179 100644
--- a/src/atlasComponents/regionalFeatures/featureContainer/featureContainer.component.ts
+++ b/src/atlasComponents/regionalFeatures/featureContainer/featureContainer.component.ts
@@ -1,4 +1,4 @@
-import { ChangeDetectionStrategy, ChangeDetectorRef, Component, ComponentFactoryResolver, ComponentRef, Input, OnChanges, SimpleChanges, ViewContainerRef } from "@angular/core";
+import { ChangeDetectionStrategy, Component, ComponentFactoryResolver, ComponentRef, Input, OnChanges, Output, SimpleChanges, ViewContainerRef, EventEmitter } from "@angular/core";
 import { Subscription } from "rxjs";
 import { IFeature, RegionalFeaturesService } from "../regionalFeature.service";
 import { ISingleFeature } from "../singleFeatures/interfaces";
@@ -16,13 +16,15 @@ export class FeatureContainer implements OnChanges{
   @Input()
   region: any
 
+  @Output()
+  viewChanged: EventEmitter<boolean> = new EventEmitter()
+
   private cr: ComponentRef<ISingleFeature>
   
   constructor(
     private vCRef: ViewContainerRef,
     private rService: RegionalFeaturesService,
     private cfr: ComponentFactoryResolver,
-    private cdr: ChangeDetectorRef
   ){
   }
 
@@ -33,15 +35,22 @@ export class FeatureContainer implements OnChanges{
     const { currentValue, previousValue } = simpleChanges.feature
     if (currentValue === previousValue) return
     this.clear()
+
+    /**
+     * catching instances where currentValue for feature is falsy
+     */
+    if (!currentValue) return
+
     /**
      * TODO catch if map is undefined
      */
     const comp = this.rService.mapFeatToCmp.get(currentValue.type)
+    if (!comp) throw new Error(`mapFeatToCmp for ${currentValue.type} not defined`)
     const cf = this.cfr.resolveComponentFactory<ISingleFeature>(comp)
     this.cr = this.vCRef.createComponent(cf)
     this.cr.instance.feature = this.feature
     this.cr.instance.region = this.region
-    this.viewChangedSub = this.cr.instance.viewChanged.subscribe(() => this.cdr.detectChanges())
+    this.viewChangedSub = this.cr.instance.viewChanged.subscribe(() => this.viewChanged.emit(true))
   }
 
   clear(){
diff --git a/src/atlasComponents/regionalFeatures/singleFeatures/iEEGRecordings/iEEGRecordings/iEEGRecordings.component.ts b/src/atlasComponents/regionalFeatures/singleFeatures/iEEGRecordings/iEEGRecordings/iEEGRecordings.component.ts
index af0dcab8913fa06d2f7ad55f6ffadc309aae69dc..072cbabf90ec1d731fe4a767dcd78ee76ba7d4b9 100644
--- a/src/atlasComponents/regionalFeatures/singleFeatures/iEEGRecordings/iEEGRecordings/iEEGRecordings.component.ts
+++ b/src/atlasComponents/regionalFeatures/singleFeatures/iEEGRecordings/iEEGRecordings/iEEGRecordings.component.ts
@@ -31,7 +31,7 @@ export class IEEGRecordingsCmp extends RegionFeatureBase implements ISingleFeatu
     super(regionFeatureService)
   }
 
-  public viewChanged = new EventEmitter<null>()
+  public viewChanged = new EventEmitter<boolean>()
 
   ngOnInit(){
     if (this.regClickIntp) {
@@ -71,7 +71,7 @@ export class IEEGRecordingsCmp extends RegionFeatureBase implements ISingleFeatu
     )
 
     this.sub.push(
-      this.dataIsLoading$.subscribe(() => this.viewChanged.emit(null))
+      this.dataIsLoading$.subscribe(() => this.viewChanged.emit(true))
     )
 
     this.onDestroyCb.push(() => {
diff --git a/src/atlasComponents/regionalFeatures/singleFeatures/interfaces.ts b/src/atlasComponents/regionalFeatures/singleFeatures/interfaces.ts
index 37abcd4479aa87e9dabed72e589d2a3b82a091bd..bd3861d391b4bcc90d262ee16e124b51e4affee2 100644
--- a/src/atlasComponents/regionalFeatures/singleFeatures/interfaces.ts
+++ b/src/atlasComponents/regionalFeatures/singleFeatures/interfaces.ts
@@ -4,5 +4,5 @@ import { IFeature } from "../regionalFeature.service";
 export interface ISingleFeature{
   feature: IFeature
   region: any
-  viewChanged: EventEmitter<null>
+  viewChanged: EventEmitter<boolean>
 }
diff --git a/src/atlasComponents/uiSelectors/atlasLayerSelector/atlasLayerSelector.component.ts b/src/atlasComponents/uiSelectors/atlasLayerSelector/atlasLayerSelector.component.ts
index 088c98dbefb4b85f4eb19b0f88ff9efcf59cf263..046aa3448b8566a3c9fcd0179560e5d6aa1908ef 100644
--- a/src/atlasComponents/uiSelectors/atlasLayerSelector/atlasLayerSelector.component.ts
+++ b/src/atlasComponents/uiSelectors/atlasLayerSelector/atlasLayerSelector.component.ts
@@ -1,6 +1,6 @@
 import { Component, OnInit, ViewChildren, QueryList, HostBinding } from "@angular/core";
 import { select, Store } from "@ngrx/store";
-import { distinctUntilChanged, map, withLatestFrom, shareReplay, groupBy, mergeMap, toArray, switchMap, scan, filter } from "rxjs/operators";
+import { distinctUntilChanged, map, withLatestFrom, shareReplay, groupBy, mergeMap, toArray, switchMap, scan, filter, startWith } from "rxjs/operators";
 import { Observable, Subscription, from, zip, of, combineLatest } from "rxjs";
 import { viewerStateSelectTemplateWithId, viewerStateToggleLayer } from "src/services/state/viewerState.store.helper";
 import { MatMenuTrigger } from "@angular/material/menu";
diff --git a/src/atlasViewer/atlasViewer.apiService.service.ts b/src/atlasViewer/atlasViewer.apiService.service.ts
index d77129d69ba46c90ac2eee782cac01fb1948112a..5b3fe24f2717e0df81e7bb2951ac799165b17e1f 100644
--- a/src/atlasViewer/atlasViewer.apiService.service.ts
+++ b/src/atlasViewer/atlasViewer.apiService.service.ts
@@ -437,14 +437,8 @@ export interface IVIewerHandle {
   showAllSegments: () => void
   hideAllSegments: () => void
 
-  // TODO deprecate
-  segmentColourMap: Map<number, {red: number, green: number, blue: number}>
-
   getLayersSegmentColourMap: () => Map<string, Map<number, {red: number, green: number, blue: number}>>
 
-  // TODO deprecate
-  applyColourMap: (newColourMap: Map<number, {red: number, green: number, blue: number}>) => void
-
   applyLayersColourMap: (newLayerColourMap: Map<string, Map<number, {red: number, green: number, blue: number}>>) => void
 
   loadLayer: (layerobj: any) => any
diff --git a/src/atlasViewer/atlasViewer.component.ts b/src/atlasViewer/atlasViewer.component.ts
index d80b8e60f4868cbd2e1e30f820f495cc0b555a66..7a2af6e9ed3a85bac69a58b7ae6422232377180e 100644
--- a/src/atlasViewer/atlasViewer.component.ts
+++ b/src/atlasViewer/atlasViewer.component.ts
@@ -90,8 +90,6 @@ export class AtlasViewer implements OnDestroy, OnInit, AfterViewInit {
 
   public onhoverLandmark$: Observable<{landmarkName: string, datasets: any} | null>
 
-  public overwrittenColorMap$: Observable<any>
-
   private subscriptions: Subscription[] = []
 
   public unsupportedPreviewIdx: number = 0
@@ -180,13 +178,6 @@ export class AtlasViewer implements OnDestroy, OnInit, AfterViewInit {
 
     )
 
-    this.overwrittenColorMap$ = this.store.pipe(
-      select('viewerState'),
-      safeFilter('overwrittenColorMap'),
-      map(state => state.overwrittenColorMap),
-      distinctUntilChanged()
-    )
-
     const error = this.el.nativeElement.getAttribute('data-error')
 
     if (error) {
diff --git a/src/glue.ts b/src/glue.ts
index d2c6756cd0d534834fddb900464e406317641cb7..451e16b0968e76c0b5c0d0d677fc2c5cf012374e 100644
--- a/src/glue.ts
+++ b/src/glue.ts
@@ -631,6 +631,7 @@ export class DatasetPreviewGlue implements IDatasetPreviewGlue, OnDestroy{
   }
   
   public datasetPreviewDisplayed(file: DatasetPreview, dataset?: IKgDataEntry){
+    if (!file) return of(false)
     return this.previewingDatasetFiles$.pipe(
       map(datasetPreviews => {
         const { filename, datasetId } = file
diff --git a/src/plugin_examples/migrationGuide.md b/src/plugin_examples/migrationGuide.md
index 9cd95c535efd5699d03ed3d04e2d57afc5ad554a..fcd5e040b9333b262dbbac60b6d3237859fe7f1c 100644
--- a/src/plugin_examples/migrationGuide.md
+++ b/src/plugin_examples/migrationGuide.md
@@ -34,7 +34,6 @@ Plugin APIs have changed drastically from v0.1.0 to v0.2.0. Here is a list of pl
   - *showAllSegments()* : Function that selects all segments.
   - *hideAllSegments()* : Function that deselects all segments.
   - *loadLayer(layerObject)* : Function that loads a custom neuroglancer compatible layer into the viewer (e.g. precomputed, NIFTI, etc). Does not influence UI. 
-  - ~~*reapplyNehubaMeshFix()* Function that reapplies the cosmetic change to NehubaViewer (such as custom colour map, if defined)~~ removed. use **applyColourMap(colourMap)** instead
   - *mouseEvent* RxJs Observable. Read more at [rxjs doc](http://reactivex.io/rxjs/)
     - *mouseEvent.filter(filterFn:({eventName : String, event: Event})=>boolean)* returns an Observable. Filters the event stream according to the filter function.
     - *mouseEvent.map(mapFn:({eventName : String, event: Event})=>any)* returns an Observable. Map the event stream according to the map function.
diff --git a/src/res/css/extra_styles.css b/src/res/css/extra_styles.css
index 88e4a8d10e17d410aa6dcce4fbd3a842cb437766..3aa834fd880fdbb63398bba87fb98fa8cbf3bd5f 100644
--- a/src/res/css/extra_styles.css
+++ b/src/res/css/extra_styles.css
@@ -176,6 +176,11 @@ markdown-dom pre code
   white-space:pre;
 }
 
+markdown-dom p
+{
+  margin: 0;
+}
+
 .highlight
 {
   background-color:rgba(150,150,0,0.5);
diff --git a/src/res/ext/MNI152.json b/src/res/ext/MNI152.json
index f7b08d8e701937661663eb5d3ebbaca05a710952..c47348065055770a66277a9b384fdc05962200c0 100644
--- a/src/res/ext/MNI152.json
+++ b/src/res/ext/MNI152.json
@@ -7,6 +7,23 @@
   "species": "Human",
   "useTheme": "dark",
   "ngId": "mni152",
+  "auxMeshes": [{
+    "name": "ICBM152 2009c nonlinear asymmetric - Cortex",
+    "displayName": "Cortex",
+    "@id": "icbm2009c_nonlin_asym_cortex",
+    "ngId": "auxMesh",
+    "labelIndicies": [ 65500, 65510 ],
+    "rgb": [255, 255, 255],
+    "visible": true
+  },{
+    "name": "ICBM152 2009c nonlinear asymmetric - Sulci",
+    "displayName": "Sulci",
+    "@id": "icbm2009c_nonlin_asym_sulci",
+    "ngId": "auxMesh",
+    "labelIndicies": [ 65501, 65511 ],
+    "rgb": [255, 255, 255],
+    "visible": false
+  }],
   "nehubaConfigURL": "nehubaConfig/MNI152NehubaConfig",
   "parcellations": [
     {
@@ -14,16 +31,13 @@
       "@id": "minds/core/parcellationatlas/v1.0.0/94c1125b-b87e-45e4-901c-00daee7f2579-25",
       "name": "Cytoarchitectonic Maps - v2.5.1",
       "displayName": "Cytoarchitectonic Maps",
-      "auxillaryMeshIndices": [
-        65535
-      ],
       "hasAdditionalViewMode": [
         "connectivity"
       ],
       "originDatasets": [
         {
           "kgSchema": "minds/core/dataset/v1.0.0",
-          "kgId": "ef48c5e9-6b3c-4d5a-a9a9-e678fe10bdf6"
+          "kgId": "2eaa3dc6-a21b-41c1-b703-bf06f82adf25"
         }
       ],
       "properties": {
@@ -62,12 +76,20 @@
                             {
                               "name": "Ch 123 (Basal Forebrain)",
                               "status": "left hemisphere",
-                              "labelIndex": 62,
+                              "labelIndex": 79,
                               "ngId": "MNI152_V25_LEFT_NG_SPLIT_HEMISPHERE",
                               "_": {
                                 "xml": {
                                   "name": "Ch 123 (Basal Forebrain)",
                                   "gray": "79"
+                                },
+                                "xml253": {
+                                  "_": "Ch 123 (Basal Forebrain)",
+                                  "$": {
+                                    "num": "78",
+                                    "id": "286",
+                                    "grayvalue": "79"
+                                  }
                                 }
                               },
                               "originDatasets": [
@@ -97,12 +119,20 @@
                             {
                               "name": "Ch 123 (Basal Forebrain)",
                               "status": "right hemisphere",
-                              "labelIndex": 62,
+                              "labelIndex": 79,
                               "ngId": "MNI152_V25_RIGHT_NG_SPLIT_HEMISPHERE",
                               "_": {
                                 "xml": {
                                   "name": "Ch 123 (Basal Forebrain)",
                                   "gray": "79"
+                                },
+                                "xml253": {
+                                  "_": "Ch 123 (Basal Forebrain)",
+                                  "$": {
+                                    "num": "78",
+                                    "id": "286",
+                                    "grayvalue": "79"
+                                  }
                                 }
                               },
                               "originDatasets": [
@@ -153,12 +183,20 @@
                             {
                               "name": "Ch 4 (Basal Forebrain)",
                               "status": "left hemisphere",
-                              "labelIndex": 97,
+                              "labelIndex": 13,
                               "ngId": "MNI152_V25_LEFT_NG_SPLIT_HEMISPHERE",
                               "_": {
                                 "xml": {
                                   "name": "Ch 4 (Basal Forebrain)",
                                   "gray": "13"
+                                },
+                                "xml253": {
+                                  "_": "Ch 4 (Basal Forebrain)",
+                                  "$": {
+                                    "num": "12",
+                                    "id": "264",
+                                    "grayvalue": "13"
+                                  }
                                 }
                               },
                               "originDatasets": [
@@ -188,12 +226,20 @@
                             {
                               "name": "Ch 4 (Basal Forebrain)",
                               "status": "right hemisphere",
-                              "labelIndex": 97,
+                              "labelIndex": 13,
                               "ngId": "MNI152_V25_RIGHT_NG_SPLIT_HEMISPHERE",
                               "_": {
                                 "xml": {
                                   "name": "Ch 4 (Basal Forebrain)",
                                   "gray": "13"
+                                },
+                                "xml253": {
+                                  "_": "Ch 4 (Basal Forebrain)",
+                                  "$": {
+                                    "num": "12",
+                                    "id": "264",
+                                    "grayvalue": "13"
+                                  }
                                 }
                               },
                               "originDatasets": [
@@ -244,12 +290,20 @@
                             {
                               "name": "Ch 123 (Basal Forebrain)",
                               "status": "left hemisphere",
-                              "labelIndex": 62,
+                              "labelIndex": 79,
                               "ngId": "MNI152_V25_LEFT_NG_SPLIT_HEMISPHERE",
                               "_": {
                                 "xml": {
                                   "name": "Ch 123 (Basal Forebrain)",
                                   "gray": "79"
+                                },
+                                "xml253": {
+                                  "_": "Ch 123 (Basal Forebrain)",
+                                  "$": {
+                                    "num": "78",
+                                    "id": "286",
+                                    "grayvalue": "79"
+                                  }
                                 }
                               },
                               "originDatasets": [
@@ -279,12 +333,20 @@
                             {
                               "name": "Ch 123 (Basal Forebrain)",
                               "status": "right hemisphere",
-                              "labelIndex": 62,
+                              "labelIndex": 79,
                               "ngId": "MNI152_V25_RIGHT_NG_SPLIT_HEMISPHERE",
                               "_": {
                                 "xml": {
                                   "name": "Ch 123 (Basal Forebrain)",
                                   "gray": "79"
+                                },
+                                "xml253": {
+                                  "_": "Ch 123 (Basal Forebrain)",
+                                  "$": {
+                                    "num": "78",
+                                    "id": "286",
+                                    "grayvalue": "79"
+                                  }
                                 }
                               },
                               "originDatasets": [
@@ -340,12 +402,20 @@
                             {
                               "name": "LB (Amygdala)",
                               "status": "left hemisphere",
-                              "labelIndex": 41,
+                              "labelIndex": 94,
                               "ngId": "MNI152_V25_LEFT_NG_SPLIT_HEMISPHERE",
                               "_": {
                                 "xml": {
                                   "name": "LB (Amygdala)",
                                   "gray": "94"
+                                },
+                                "xml253": {
+                                  "_": "LB (Amygdala)",
+                                  "$": {
+                                    "num": "93",
+                                    "id": "187",
+                                    "grayvalue": "94"
+                                  }
                                 }
                               },
                               "originDatasets": [
@@ -375,12 +445,20 @@
                             {
                               "name": "LB (Amygdala)",
                               "status": "right hemisphere",
-                              "labelIndex": 41,
+                              "labelIndex": 94,
                               "ngId": "MNI152_V25_RIGHT_NG_SPLIT_HEMISPHERE",
                               "_": {
                                 "xml": {
                                   "name": "LB (Amygdala)",
                                   "gray": "94"
+                                },
+                                "xml253": {
+                                  "_": "LB (Amygdala)",
+                                  "$": {
+                                    "num": "93",
+                                    "id": "187",
+                                    "grayvalue": "94"
+                                  }
                                 }
                               },
                               "originDatasets": [
@@ -431,12 +509,20 @@
                             {
                               "name": "CM (Amygdala)",
                               "status": "left hemisphere",
-                              "labelIndex": 85,
+                              "labelIndex": 44,
                               "ngId": "MNI152_V25_LEFT_NG_SPLIT_HEMISPHERE",
                               "_": {
                                 "xml": {
                                   "name": "CM (Amygdala)",
                                   "gray": "44"
+                                },
+                                "xml253": {
+                                  "_": "CM (Amygdala)",
+                                  "$": {
+                                    "num": "43",
+                                    "id": "290",
+                                    "grayvalue": "44"
+                                  }
                                 }
                               },
                               "originDatasets": [
@@ -466,12 +552,20 @@
                             {
                               "name": "CM (Amygdala)",
                               "status": "right hemisphere",
-                              "labelIndex": 85,
+                              "labelIndex": 44,
                               "ngId": "MNI152_V25_RIGHT_NG_SPLIT_HEMISPHERE",
                               "_": {
                                 "xml": {
                                   "name": "CM (Amygdala)",
                                   "gray": "44"
+                                },
+                                "xml253": {
+                                  "_": "CM (Amygdala)",
+                                  "$": {
+                                    "num": "43",
+                                    "id": "290",
+                                    "grayvalue": "44"
+                                  }
                                 }
                               },
                               "originDatasets": [
@@ -517,12 +611,20 @@
                             {
                               "name": "SF (Amygdala)",
                               "status": "left hemisphere",
-                              "labelIndex": 5,
+                              "labelIndex": 111,
                               "ngId": "MNI152_V25_LEFT_NG_SPLIT_HEMISPHERE",
                               "_": {
                                 "xml": {
                                   "name": "SF (Amygdala)",
                                   "gray": "110"
+                                },
+                                "xml253": {
+                                  "_": "SF (Amygdala)",
+                                  "$": {
+                                    "num": "110",
+                                    "id": "185",
+                                    "grayvalue": "111"
+                                  }
                                 }
                               },
                               "originDatasets": [
@@ -552,12 +654,20 @@
                             {
                               "name": "SF (Amygdala)",
                               "status": "right hemisphere",
-                              "labelIndex": 5,
+                              "labelIndex": 110,
                               "ngId": "MNI152_V25_RIGHT_NG_SPLIT_HEMISPHERE",
                               "_": {
                                 "xml": {
                                   "name": "SF (Amygdala)",
                                   "gray": "110"
+                                },
+                                "xml253": {
+                                  "_": "SF (Amygdala)",
+                                  "$": {
+                                    "num": "109",
+                                    "id": "185",
+                                    "grayvalue": "110"
+                                  }
                                 }
                               },
                               "originDatasets": [
@@ -608,12 +718,20 @@
                             {
                               "name": "VTM (Amygdala)",
                               "status": "left hemisphere",
-                              "labelIndex": 109,
+                              "labelIndex": 83,
                               "ngId": "MNI152_V25_LEFT_NG_SPLIT_HEMISPHERE",
                               "_": {
                                 "xml": {
                                   "name": "VTM (Amygdala)",
                                   "gray": "83"
+                                },
+                                "xml253": {
+                                  "_": "VTM (Amygdala)",
+                                  "$": {
+                                    "num": "82",
+                                    "id": "228",
+                                    "grayvalue": "83"
+                                  }
                                 }
                               },
                               "originDatasets": [
@@ -643,12 +761,20 @@
                             {
                               "name": "VTM (Amygdala)",
                               "status": "right hemisphere",
-                              "labelIndex": 109,
+                              "labelIndex": 83,
                               "ngId": "MNI152_V25_RIGHT_NG_SPLIT_HEMISPHERE",
                               "_": {
                                 "xml": {
                                   "name": "VTM (Amygdala)",
                                   "gray": "83"
+                                },
+                                "xml253": {
+                                  "_": "VTM (Amygdala)",
+                                  "$": {
+                                    "num": "82",
+                                    "id": "228",
+                                    "grayvalue": "83"
+                                  }
                                 }
                               },
                               "originDatasets": [
@@ -694,12 +820,20 @@
                             {
                               "name": "IF (Amygdala)",
                               "status": "left hemisphere",
-                              "labelIndex": 46,
+                              "labelIndex": 61,
                               "ngId": "MNI152_V25_LEFT_NG_SPLIT_HEMISPHERE",
                               "_": {
                                 "xml": {
                                   "name": "IF (Amygdala)",
                                   "gray": "61"
+                                },
+                                "xml253": {
+                                  "_": "IF (Amygdala)",
+                                  "$": {
+                                    "num": "60",
+                                    "id": "237",
+                                    "grayvalue": "61"
+                                  }
                                 }
                               },
                               "originDatasets": [
@@ -729,12 +863,20 @@
                             {
                               "name": "IF (Amygdala)",
                               "status": "right hemisphere",
-                              "labelIndex": 46,
+                              "labelIndex": 61,
                               "ngId": "MNI152_V25_RIGHT_NG_SPLIT_HEMISPHERE",
                               "_": {
                                 "xml": {
                                   "name": "IF (Amygdala)",
                                   "gray": "61"
+                                },
+                                "xml253": {
+                                  "_": "IF (Amygdala)",
+                                  "$": {
+                                    "num": "60",
+                                    "id": "237",
+                                    "grayvalue": "61"
+                                  }
                                 }
                               },
                               "originDatasets": [
@@ -780,12 +922,20 @@
                             {
                               "name": "MF (Amygdala)",
                               "status": "left hemisphere",
-                              "labelIndex": 123,
+                              "labelIndex": 104,
                               "ngId": "MNI152_V25_LEFT_NG_SPLIT_HEMISPHERE",
                               "_": {
                                 "xml": {
                                   "name": "MF (Amygdala)",
                                   "gray": "104"
+                                },
+                                "xml253": {
+                                  "_": "MF (Amygdala)",
+                                  "$": {
+                                    "num": "103",
+                                    "id": "235",
+                                    "grayvalue": "104"
+                                  }
                                 }
                               },
                               "originDatasets": [
@@ -815,12 +965,20 @@
                             {
                               "name": "MF (Amygdala)",
                               "status": "right hemisphere",
-                              "labelIndex": 123,
+                              "labelIndex": 104,
                               "ngId": "MNI152_V25_RIGHT_NG_SPLIT_HEMISPHERE",
                               "_": {
                                 "xml": {
                                   "name": "MF (Amygdala)",
                                   "gray": "104"
+                                },
+                                "xml253": {
+                                  "_": "MF (Amygdala)",
+                                  "$": {
+                                    "num": "103",
+                                    "id": "235",
+                                    "grayvalue": "104"
+                                  }
                                 }
                               },
                               "originDatasets": [
@@ -871,12 +1029,20 @@
                             {
                               "name": "CM (Amygdala)",
                               "status": "left hemisphere",
-                              "labelIndex": 85,
+                              "labelIndex": 44,
                               "ngId": "MNI152_V25_LEFT_NG_SPLIT_HEMISPHERE",
                               "_": {
                                 "xml": {
                                   "name": "CM (Amygdala)",
                                   "gray": "44"
+                                },
+                                "xml253": {
+                                  "_": "CM (Amygdala)",
+                                  "$": {
+                                    "num": "43",
+                                    "id": "290",
+                                    "grayvalue": "44"
+                                  }
                                 }
                               },
                               "originDatasets": [
@@ -906,12 +1072,20 @@
                             {
                               "name": "CM (Amygdala)",
                               "status": "right hemisphere",
-                              "labelIndex": 85,
+                              "labelIndex": 44,
                               "ngId": "MNI152_V25_RIGHT_NG_SPLIT_HEMISPHERE",
                               "_": {
                                 "xml": {
                                   "name": "CM (Amygdala)",
                                   "gray": "44"
+                                },
+                                "xml253": {
+                                  "_": "CM (Amygdala)",
+                                  "$": {
+                                    "num": "43",
+                                    "id": "290",
+                                    "grayvalue": "44"
+                                  }
                                 }
                               },
                               "originDatasets": [
@@ -972,12 +1146,20 @@
                             {
                               "name": "Area 5L (SPL)",
                               "status": "left hemisphere",
-                              "labelIndex": 83,
+                              "labelIndex": 97,
                               "ngId": "MNI152_V25_LEFT_NG_SPLIT_HEMISPHERE",
                               "_": {
                                 "xml": {
                                   "name": "Area 5L (SPL)",
                                   "gray": "98"
+                                },
+                                "xml253": {
+                                  "_": "Area 5L (SPL)",
+                                  "$": {
+                                    "num": "96",
+                                    "id": "130",
+                                    "grayvalue": "97"
+                                  }
                                 }
                               },
                               "originDatasets": [
@@ -1007,12 +1189,20 @@
                             {
                               "name": "Area 5L (SPL)",
                               "status": "right hemisphere",
-                              "labelIndex": 83,
+                              "labelIndex": 97,
                               "ngId": "MNI152_V25_RIGHT_NG_SPLIT_HEMISPHERE",
                               "_": {
                                 "xml": {
                                   "name": "Area 5L (SPL)",
                                   "gray": "97"
+                                },
+                                "xml253": {
+                                  "_": "Area 5L (SPL)",
+                                  "$": {
+                                    "num": "96",
+                                    "id": "130",
+                                    "grayvalue": "97"
+                                  }
                                 }
                               },
                               "originDatasets": [
@@ -1058,12 +1248,20 @@
                             {
                               "name": "Area 7M (SPL)",
                               "status": "left hemisphere",
-                              "labelIndex": 124,
+                              "labelIndex": 89,
                               "ngId": "MNI152_V25_LEFT_NG_SPLIT_HEMISPHERE",
                               "_": {
                                 "xml": {
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                                   "name": "Area PFt (IPL)",
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                                 "xml": {
                                   "name": "Area PFm (IPL)",
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                                 "xml": {
                                   "name": "Area PFm (IPL)",
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                                 "xml": {
                                   "name": "Area PGp (IPL)",
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                                   "name": "Area PGp (IPL)",
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                                 "xml": {
                                   "name": "Area PFop (IPL)",
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                                   "name": "Area PFop (IPL)",
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                                   "name": "Area hPO1 (POS)",
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                                   "name": "Area hPO1 (POS)",
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                                   "name": "Area hIP1 (IPS)",
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                                   "name": "Area hIP3 (IPS)",
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                                 "xml": {
                                   "name": "Area hIP2 (IPS)",
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                                 "xml": {
                                   "name": "Area hIP2 (IPS)",
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                                   "name": "Area hIP4 (IPS)",
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@@ -3747,12 +4433,20 @@
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                                 "xml": {
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@@ -3924,12 +4642,20 @@
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@@ -5527,12 +6533,20 @@
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                                 "xml": {
                                   "name": "Area Id2 (Insula)",
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@@ -7029,12 +8315,20 @@
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                                   "name": "Area Id1 (Insula)",
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                                 "xml": {
                                   "name": "Area Id5 (Insula)",
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                                 "xml": {
                                   "name": "Area Id6 (Insula)",
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                                 "xml": {
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                                 "xml": {
                                   "name": "Area Id4 (Insula)",
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                                   "name": "Area Id4 (Insula)",
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                                 "xml": {
                                   "name": "Area Id3 (Insula)",
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                                 "xml": {
                                   "name": "Area STS2 (STS)",
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                                 "xml": {
                                   "name": "Area TI (STG)",
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@@ -8046,12 +9516,20 @@
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                               "_": {
                                 "xml": {
                                   "name": "Area TeI (STG)",
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                               "_": {
                                 "xml": {
                                   "name": "Area TeI (STG)",
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@@ -8400,12 +9934,20 @@
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                                 "xml": {
                                   "name": "Area FG2 (FusG)",
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                               "_": {
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                               "_": {
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                                   "name": "HATA (Hippocampus)",
                                   "gray": "67"
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                               "_": {
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       "name": "DiFuMo Atlas (512 dimensions)",
       "ngId": "DiFuMo Atlas (512 dimensions)",
       "@id": "minds/core/parcellationatlas/v1.0.0/63b5794f-79a4-4464-8dc1-b32e170f3d16",
-      "auxillaryMeshIndices": [
-        65535
-      ],
       "originDatasets": [
         {
           "kgSchema": "minds/core/dataset/v1.0.0",
@@ -61691,9 +63713,6 @@
       "name": "DiFuMo Atlas (1024 dimensions)",
       "ngId": "DiFuMo Atlas (1024 dimensions)",
       "@id": "minds/core/parcellationatlas/v1.0.0/12fca5c5-b02c-46ce-ab9f-f12babf4c7e1",
-      "auxillaryMeshIndices": [
-        65535
-      ],
       "originDatasets": [
         {
           "kgSchema": "minds/core/dataset/v1.0.0",
diff --git a/src/res/ext/MNI152NehubaConfig.json b/src/res/ext/MNI152NehubaConfig.json
index a19a6ba72d7a8e02e32f1326b7bd080ef89401cf..a1f6f3e44abf8d865abe3bc9878b121604b07e0e 100644
--- a/src/res/ext/MNI152NehubaConfig.json
+++ b/src/res/ext/MNI152NehubaConfig.json
@@ -93,6 +93,37 @@
             ]
           ]
         },
+        "auxMesh": {
+          "type": "segmentation",
+          "visible": true,
+          "source": "precompmesh://https://neuroglancer.humanbrainproject.eu/precomputed/icbm152_2009c_nonlin_asym",
+          "transform": [
+            [
+              1,
+              0,
+              0,
+              -96500000
+            ],
+            [
+              0,
+              1,
+              0,
+              -132500000
+            ],
+            [
+              0,
+              0,
+              1,
+              -78500000
+            ],
+            [
+              0,
+              0,
+              0,
+              1
+            ]
+          ]
+        },
         "jubrain mni152 v18 left": {
           "type": "segmentation",
           "visible": false,
@@ -220,7 +251,7 @@
         "MNI152_V25_RIGHT_NG_SPLIT_HEMISPHERE": {
           "type": "segmentation",
           "visible": true,
-          "source": "precomputed://https://neuroglancer.humanbrainproject.eu/precomputed/data-repo/20201204_JulichBrainV3_0_hemisphereSplit/precomputed/JuBrain_Map_icbm_v30_r",
+          "source": "precomputed://https://neuroglancer-dev.humanbrainproject.eu/precomputed/data-repo-ng-bot/JulichBrainV2_5_3/precomputed/JulichBrain_MPMAtlas_r_N10_nlin2Stdicbm152asym2009c_publicDOI_453c4c95827e38dcce5372b200065cba",
           "transform": [
             [
               1,
@@ -251,7 +282,7 @@
         "MNI152_V25_LEFT_NG_SPLIT_HEMISPHERE": {
           "type": "segmentation",
           "visible": true,
-          "source": "precomputed://https://neuroglancer.humanbrainproject.eu/precomputed/data-repo/20201204_JulichBrainV3_0_hemisphereSplit/precomputed/JuBrain_Map_icbm_v30_l",
+          "source": "precomputed://https://neuroglancer-dev.humanbrainproject.eu//precomputed/data-repo-ng-bot/JulichBrainV2_5_3/precomputed/JulichBrain_MPMAtlas_l_N10_nlin2Stdicbm152asym2009c_publicDOI_3f5ec6016bc2242769c41befdbc1b2e0",
           "transform": [
             [
               1,
diff --git a/src/res/ext/allenMouse.json b/src/res/ext/allenMouse.json
index d8ae3d5a9f14014796c79e453aaec4a4a937269e..67432c0726200b55204b591dfb83c2b1798134de 100644
--- a/src/res/ext/allenMouse.json
+++ b/src/res/ext/allenMouse.json
@@ -9,6 +9,15 @@
     "nissl"
   ],
   "useTheme": "dark",
+  "auxMeshes": [{
+    "name": "Allen CCF v3 whole brain",
+    "displayName": "Whole brain",
+    "@id": "allen_ccf_v3_wholebrain",
+    "ngId": "auxMesh",
+    "labelIndicies": [ 997 ],
+    "rgb": [255, 255, 255],
+    "visible": true
+  }],
   "nehubaConfigURL": "nehubaConfig/allenMouseNehubaConfig",
   "parcellations": [
     {
diff --git a/src/res/ext/allenMouseNehubaConfig.json b/src/res/ext/allenMouseNehubaConfig.json
index e6ed7be2d1fe8d5f47ae27253be7375bc75ba5d1..817703930fa97632f3f25963dcae7134bbb4fc8d 100644
--- a/src/res/ext/allenMouseNehubaConfig.json
+++ b/src/res/ext/allenMouseNehubaConfig.json
@@ -142,6 +142,36 @@
               1
             ]
           ]
+        },
+        "auxMesh": {
+          "type": "segmentation",
+          "source": "precompmesh://https://neuroglancer.humanbrainproject.eu/precomputed/AMBA/parcellations/v3_2017_mesh",
+          "transform": [
+            [
+              0,
+              0,
+              -1,
+              5670000
+            ],
+            [
+              -1,
+              0,
+              0,
+              6570000
+            ],
+            [
+              0,
+              -1,
+              0,
+              3970000
+            ],
+            [
+              0,
+              0,
+              0,
+              1
+            ]
+          ]
         }
       },
       "navigation": {
diff --git a/src/res/ext/atlas/atlas_multiLevelHuman.json b/src/res/ext/atlas/atlas_multiLevelHuman.json
index 9eb2e035cb96cf9643689065f67c873be0bf5c0a..8bff76f3ec6d19cd1c975824bad57841f8bae5d4 100644
--- a/src/res/ext/atlas/atlas_multiLevelHuman.json
+++ b/src/res/ext/atlas/atlas_multiLevelHuman.json
@@ -51,20 +51,6 @@
         }
       ]
     },
-    {
-      "@id": "minds/core/referencespace/v1.0.0/7f39f7be-445b-47c0-9791-e971c0b6d992",
-      "name": "MNI Colin 27",
-      "availableIn": [
-        {
-          "@id": "minds/core/parcellationatlas/v1.0.0/94c1125b-b87e-45e4-901c-00daee7f2579-25",
-          "name": "Cytoarchitectonic maps - v2.5"
-        },
-        {
-          "@id": "juelich/iav/atlas/v1.0.0/8",
-          "name": "Cytoarchitectonic Maps - v1.18"
-        }
-      ]
-    },
     {
       "@id": "minds/core/referencespace/v1.0.0/a1655b99-82f1-420f-a3c2-fe80fd4c8588",
       "name": "Big Brain (Histology)",
@@ -111,13 +97,6 @@
           "originalDatasetFormats": [{
             "name": "probability map"
           }]
-        },
-        {
-          "@id": "minds/core/referencespace/v1.0.0/7f39f7be-445b-47c0-9791-e971c0b6d992",
-          "name": "MNI Colin 27",
-          "originalDatasetFormats": [{
-            "name": "probability map"
-          }]
         }
       ]
     },
@@ -145,7 +124,7 @@
       "@version": {
         "@next": null,
         "@this": "minds/core/parcellationatlas/v1.0.0/94c1125b-b87e-45e4-901c-00daee7f2579-25",
-        "name": "v2.5",
+        "name": "v2.6",
         "@previous": "juelich/iav/atlas/v1.0.0/8"
       },
       "availableIn": [
@@ -155,13 +134,6 @@
           "originalDatasetFormats": [{
             "name": "probability map"
           }]
-        },
-        {
-          "@id": "minds/core/referencespace/v1.0.0/7f39f7be-445b-47c0-9791-e971c0b6d992",
-          "name": "MNI Colin 27",
-          "originalDatasetFormats": [{
-            "name": "probability map"
-          }]
         }
       ]
     },
diff --git a/src/res/ext/bigbrain.json b/src/res/ext/bigbrain.json
index 85d502866ec6af1f5f8efc425b82ff33940781d9..0dec98a241ece1f0d9c5a427e265346e050d688f 100644
--- a/src/res/ext/bigbrain.json
+++ b/src/res/ext/bigbrain.json
@@ -852,36 +852,6 @@
                           "ngId": "v3v",
                           "status": "fully mapped",
                           "labelIndex": 1,
-                          "position": [],
-                          "rgb": [
-                            83,
-                            179,
-                            155
-                          ],
-                          "children": [],
-                          "fullId": {
-                            "kg": {
-                              "kgSchema": "minds/core/parcellationregion/v1.0.0",
-                              "kgId": "04674a3c-bb3a-495e-a466-206355e630bd"
-                            }
-                          },
-                          "relatedAreas": [],
-                          "originDatasets":[
-                            {
-                              "kgSchema": "minds/core/dataset/v1.0.0",
-                              "kgId": "f746514d-b79a-48e2-9c07-39f7c62459cf",
-                              "format": {
-                                "name": "Full 3D map"
-                              }
-                            }
-                          ]
-                        },
-                        {
-                          "name": "Area hOc3v (LingG)",
-                          "ngId": "v3v",
-                          "status": "fully mapped",
-                          "labelIndex": 1,
-                          "position": [],
                           "rgb": [
                             83,
                             179,
@@ -937,7 +907,6 @@
                               "ngId": "v5",
                               "status": "fully mapped",
                               "labelIndex": 1,
-                              "position": [],
                               "rgb": [
                                 255,
                                 0,
@@ -991,7 +960,6 @@
                               "ngId": "LGB-lam1",
                               "status": "fully mapped",
                               "labelIndex": 1,
-                              "position": [],
                               "rgb": [
                                 255,
                                 255,
@@ -1020,7 +988,6 @@
                               "ngId": "LGB-lam2",
                               "status": "fully mapped",
                               "labelIndex": 1,
-                              "position": [],
                               "rgb": [
                                 222,
                                 74,
@@ -1049,7 +1016,6 @@
                               "ngId": "LGB-lam3",
                               "status": "fully mapped",
                               "labelIndex": 1,
-                              "position": [],
                               "rgb": [
                                 132,
                                 90,
@@ -1078,7 +1044,6 @@
                               "ngId": "LGB-lam4",
                               "status": "fully mapped",
                               "labelIndex": 1,
-                              "position": [],
                               "rgb": [
                                 41,
                                 123,
@@ -1107,7 +1072,6 @@
                               "ngId": "LGB-lam5",
                               "status": "fully mapped",
                               "labelIndex": 1,
-                              "position": [],
                               "rgb": [
                                 82,
                                 214,
@@ -1136,7 +1100,6 @@
                               "ngId": "LGB-lam6",
                               "status": "fully mapped",
                               "labelIndex": 1,
-                              "position": [],
                               "rgb": [
                                 99,
                                 231,
@@ -1170,7 +1133,6 @@
                               "ngId": "v5",
                               "status": "fully mapped",
                               "labelIndex": 1,
-                              "position": [],
                               "rgb": [
                                 255,
                                 0,
@@ -1215,7 +1177,6 @@
                               "ngId": "LGB-lam1",
                               "status": "fully mapped",
                               "labelIndex": 1,
-                              "position": [],
                               "rgb": [
                                 255,
                                 255,
@@ -1235,7 +1196,6 @@
                               "ngId": "LGB-lam2",
                               "status": "fully mapped",
                               "labelIndex": 1,
-                              "position": [],
                               "rgb": [
                                 222,
                                 74,
@@ -1255,7 +1215,6 @@
                               "ngId": "LGB-lam3",
                               "status": "fully mapped",
                               "labelIndex": 1,
-                              "position": [],
                               "rgb": [
                                 132,
                                 90,
@@ -1275,7 +1234,6 @@
                               "ngId": "LGB-lam4",
                               "status": "fully mapped",
                               "labelIndex": 1,
-                              "position": [],
                               "rgb": [
                                 41,
                                 123,
@@ -1295,7 +1253,6 @@
                               "ngId": "LGB-lam5",
                               "status": "fully mapped",
                               "labelIndex": 1,
-                              "position": [],
                               "rgb": [
                                 82,
                                 214,
@@ -1315,7 +1272,6 @@
                               "ngId": "LGB-lam6",
                               "status": "fully mapped",
                               "labelIndex": 1,
-                              "position": [],
                               "rgb": [
                                 99,
                                 231,
@@ -1511,6 +1467,23 @@
       "type": "parcellation",
       "ngData": null,
       "ngId": " tissue type: ",
+      "auxMeshes": [{
+        "name": "Big Brain - white matter",
+        "displayName": "White matter",
+        "@id": "bigbrain_whitematter",
+        "ngId": "auxMesh",
+        "labelIndicies": [ 200 ],
+        "rgb": [255, 255, 255],
+        "visible": false
+      },{
+        "name": "Big Brain - grey matter",
+        "displayName": "Grey matter",
+        "@id": "bigbrain_greymatter",
+        "ngId": "auxMesh",
+        "labelIndicies": [ 100 ],
+        "rgb": [255, 255, 255],
+        "visible": true
+      }],
       "regions": [
         {
           "name": "Isocortex",
diff --git a/src/res/ext/bigbrainNehubaConfig.json b/src/res/ext/bigbrainNehubaConfig.json
index 941fd3fb2a8767a1052ea7cdec20aca6613152c4..2c858a69e4756bdd706387d325e2f0244d85bb46 100644
--- a/src/res/ext/bigbrainNehubaConfig.json
+++ b/src/res/ext/bigbrainNehubaConfig.json
@@ -93,6 +93,37 @@
             ]
           ]
         },
+        "auxMesh": {
+          "type": "segmentation",
+          "visible": false,
+          "source": "precompmesh://https://neuroglancer.humanbrainproject.org/precomputed/BigBrainRelease.2015/classif_mesh",
+          "transform": [
+            [
+              1,
+              0,
+              0,
+              -70666600
+            ],
+            [
+              0,
+              1,
+              0,
+              -72910000
+            ],
+            [
+              0,
+              0,
+              1,
+              -58777700
+            ],
+            [
+              0,
+              0,
+              0,
+              1
+            ]
+          ]
+        },
         "v1": {
           "type": "segmentation",
           "source": "precomputed://https://neuroglancer.humanbrainproject.org/precomputed/BigBrainRelease.2015/2019_05_01_v1",
diff --git a/src/res/ext/colin.json b/src/res/ext/colin.json
index 932ccb8a54b4caa2e0306a81f27941dfa5547911..2c1d0cd2639a41c661fb6e45c8f695e84299ee33 100644
--- a/src/res/ext/colin.json
+++ b/src/res/ext/colin.json
@@ -22,7 +22,7 @@
       "originDatasets": [
         {
           "kgSchema": "minds/core/dataset/v1.0.0",
-          "kgId": "ef48c5e9-6b3c-4d5a-a9a9-e678fe10bdf6"
+          "kgId": "2eaa3dc6-a21b-41c1-b703-bf06f82adf25"
         }
       ],
       "properties": {
diff --git a/src/ui/ui.module.ts b/src/ui/ui.module.ts
index 708649fd9aad63c7814d30eeea689076d68821a2..7145621bc27bf7ae34fd0d85dde3d3d43a7dc14e 100644
--- a/src/ui/ui.module.ts
+++ b/src/ui/ui.module.ts
@@ -3,7 +3,6 @@ import { ComponentsModule } from "src/components/components.module";
 
 import { FormsModule, ReactiveFormsModule } from "@angular/forms";
 import { LayoutModule } from "src/layouts/layout.module";
-// import { NehubaContainer } from "./nehubaContainer/nehubaContainer.component";
 
 import { FilterRegionDataEntries } from "src/util/pipes/filterRegionDataEntries.pipe";
 import { GroupDatasetByRegion } from "src/util/pipes/groupDataEntriesByRegion.pipe";
@@ -28,7 +27,6 @@ import { DatabrowserModule } from "../atlasComponents/databrowserModule/databrow
 import { LogoContainer } from "./logoContainer/logoContainer.component";
 import { MobileOverlay } from "./nehubaContainer/mobileOverlay/mobileOverlay.component";
 import { MobileControlNubStylePipe } from "./nehubaContainer/pipes/mobileControlNubStyle.pipe";
-// import { StatusCardComponent } from "./nehubaContainer/statusCard/statusCard.component";
 
 import { HumanReadableFileSizePipe } from "src/util/pipes/humanReadableFileSize.pipe";
 import { KgSearchBtnColorPipe } from "src/util/pipes/kgSearchBtnColor.pipe";
@@ -73,14 +71,11 @@ import { AtlasCmptConnModule } from "src/atlasComponents/connectivity";
     AtlasCmptConnModule,
   ],
   declarations : [
-    // NehubaContainer,
     
     CitationsContainer,
     LogoContainer,
     MobileOverlay,
 
-    // StatusCardComponent,
-
     ActionDialog,
 
     /* pipes */
diff --git a/src/util/fn.spec.ts b/src/util/fn.spec.ts
index f17d211b79c3b363eb7da40c9e517817a66db4a5..be7d8b7dd660ec877b5fc640883eaae03712d2f5 100644
--- a/src/util/fn.spec.ts
+++ b/src/util/fn.spec.ts
@@ -1,9 +1,13 @@
+import { fakeAsync, tick } from '@angular/core/testing'
 import {} from 'jasmine'
-import { isSame, getGetRegionFromLabelIndexId } from './fn'
+import { cold, hot } from 'jasmine-marbles'
+import { of } from 'rxjs'
+import { switchMap } from 'rxjs/operators'
+import { isSame, getGetRegionFromLabelIndexId, switchMapWaitFor } from './fn'
 
-describe(`util/fn.ts`, () => {
+describe(`> util/fn.ts`, () => {
 
-  describe('getGetRegionFromLabelIndexId', () => {
+  describe('> #getGetRegionFromLabelIndexId', () => {
     const colinsJson = require('!json-loader!../res/ext/colin.json')
     
     const COLIN_JULICHBRAIN_LAYER_NAME = `COLIN_V25_LEFT_NG_SPLIT_HEMISPHERE`
@@ -23,7 +27,7 @@ describe(`util/fn.ts`, () => {
       
     })
   })
-  describe(`#isSame`, () => {
+  describe(`> #isSame`, () => {
     it('should return true with null, null', () => {
       expect(isSame(null, null)).toBe(true)
     })
@@ -49,4 +53,29 @@ describe(`util/fn.ts`, () => {
       expect(obj).not.toEqual(obj2)
     })
   })
+
+  describe('> #switchMapWaitFor', () => {
+    const val = 'hello world'
+    describe('> if condition is true to begin', () => {
+      const conditionFn = jasmine.createSpy()
+      beforeEach(() => {
+        conditionFn.and.returnValue(true)
+      })
+      afterEach(() => {
+        conditionFn.calls.reset()
+      })
+      it('> should wait for 16 ms then emit', fakeAsync(() => {
+        const obs$ = of(val).pipe(
+          switchMap(switchMapWaitFor({
+            condition: conditionFn
+          }))
+        )
+        obs$.subscribe(ex => {
+          expect(conditionFn).toHaveBeenCalled()
+          expect(ex).toEqual(val)
+        })
+        tick(200)
+      }))
+    })
+  })
 })
diff --git a/src/util/fn.ts b/src/util/fn.ts
index f8f65694eae2e8623f73a7f1b5ceaf0fe38ec425..4f673a08e5b2ace779f13d8994d68965687688af 100644
--- a/src/util/fn.ts
+++ b/src/util/fn.ts
@@ -1,4 +1,6 @@
 import { deserialiseParcRegionId } from 'common/util'
+import { interval } from 'rxjs'
+import { filter, mapTo, take } from 'rxjs/operators'
 
 export function isSame(o, n) {
   if (!o) { return !n }
@@ -69,3 +71,15 @@ const include = <T extends TPrimitive>(el: T, arr: T[]) => arr.indexOf(el) >= 0
 export const arrayOfPrimitiveEqual = <T extends TPrimitive>(o: T[], n: T[]) =>
   o.every(el => include(el, n))
   && n.every(el => include(el, o))
+
+interface ISwitchMapWaitFor {
+  interval?: number
+  condition: () => boolean
+}
+export function switchMapWaitFor(opts: ISwitchMapWaitFor){
+  return (arg: unknown) => interval(opts.interval || 16).pipe(
+    filter(() => opts.condition()),
+    take(1),
+    mapTo(arg)
+  )
+}
diff --git a/src/viewerModule/nehuba/actions.ts b/src/viewerModule/nehuba/actions.ts
deleted file mode 100644
index 979a485f1694ed7586d2326a5a286703d4610522..0000000000000000000000000000000000000000
--- a/src/viewerModule/nehuba/actions.ts
+++ /dev/null
@@ -1,10 +0,0 @@
-import { createAction, props } from "@ngrx/store";
-import { INgLayerInterface } from "src/services/state/ngViewerState.store";
-import { NEHUBA_VIEWER_FEATURE_KEY } from "./constants";
-
-export const actionAddNgLayer = createAction(
-  `[${NEHUBA_VIEWER_FEATURE_KEY}] [addNgLayer]`,
-  props<{
-    layers: INgLayerInterface[]
-  }>()
-)
\ No newline at end of file
diff --git a/src/viewerModule/nehuba/constants.ts b/src/viewerModule/nehuba/constants.ts
index 81b4f89cf14e6ecdc98431ea1f4fe35ab902f575..9428b63efb8eed35e8d634de1ddd82667e77107b 100644
--- a/src/viewerModule/nehuba/constants.ts
+++ b/src/viewerModule/nehuba/constants.ts
@@ -15,7 +15,13 @@ export interface INgLayerInterface {
   transform?: any
 }
 
-export function getMultiNgIdsRegionsLabelIndexMap(parcellation: any = {}, inheritAttrsOpt: any = { ngId: 'root' }): Map<string, Map<number, any>> {
+export interface IRegion {
+  [key: string]: any
+  ngId: string
+  rgb?: [number, number, number]
+}
+
+export function getMultiNgIdsRegionsLabelIndexMap(parcellation: any = {}, inheritAttrsOpt: any = { ngId: 'root' }): Map<string, Map<number, IRegion>> {
   const map: Map<string, Map<number, any>> = new Map()
   
   const inheritAttrs = Object.keys(inheritAttrsOpt)
diff --git a/src/viewerModule/nehuba/layerCtrl.service/index.ts b/src/viewerModule/nehuba/layerCtrl.service/index.ts
new file mode 100644
index 0000000000000000000000000000000000000000..61975bcfe1e269f45f4774e535089977b02bf1ea
--- /dev/null
+++ b/src/viewerModule/nehuba/layerCtrl.service/index.ts
@@ -0,0 +1,10 @@
+export {
+  NehubaLayerControlService
+} from './layerCtrl.service'
+
+export {
+  IColorMap,
+  SET_COLORMAP_OBS,
+  SET_LAYER_VISIBILITY,
+  getRgb,
+} from './layerCtrl.util'
diff --git a/src/viewerModule/nehuba/layerCtrl.service/layerCtrl.service.spec.ts b/src/viewerModule/nehuba/layerCtrl.service/layerCtrl.service.spec.ts
new file mode 100644
index 0000000000000000000000000000000000000000..cb0e151e25db43987e08f28862d77be36a52b112
--- /dev/null
+++ b/src/viewerModule/nehuba/layerCtrl.service/layerCtrl.service.spec.ts
@@ -0,0 +1,271 @@
+import { TestBed } from "@angular/core/testing"
+import { MockStore, provideMockStore } from "@ngrx/store/testing"
+import { viewerStateSelectedParcellationSelector, viewerStateSelectedTemplateSelector } from "src/services/state/viewerState/selectors"
+import { NehubaLayerControlService } from "./layerCtrl.service"
+import * as layerCtrlUtil from '../constants'
+import { hot } from "jasmine-marbles"
+
+
+describe('> layerctrl.service.ts', () => {
+  describe('> NehubaLayerControlService', () => {
+    let mockStore: MockStore
+    let getMultiNgIdsRegionsLabelIndexMapSpy: jasmine.Spy
+    let getMultiNgIdsRegionsLabelIndexMapReturnVal: Map<string, Map<number, layerCtrlUtil.IRegion>>
+    beforeEach(() => {
+      TestBed.configureTestingModule({
+        providers: [
+          NehubaLayerControlService,
+          provideMockStore()
+        ]
+      })
+
+      mockStore = TestBed.inject(MockStore)
+      getMultiNgIdsRegionsLabelIndexMapReturnVal = new Map()
+      getMultiNgIdsRegionsLabelIndexMapSpy = spyOnProperty(
+        layerCtrlUtil,
+        'getMultiNgIdsRegionsLabelIndexMap'
+      ).and.returnValue(() => getMultiNgIdsRegionsLabelIndexMapReturnVal)
+    })
+
+    it('> can be init', () => {
+      const service = TestBed.inject(NehubaLayerControlService)
+      expect(service).toBeTruthy()
+    })
+
+    describe('> setColorMap$', () => {
+      describe('> overwriteColorMap$ not firing', () => {
+        describe('> template/parc has no aux meshes', () => {
+          beforeEach(() => {
+            mockStore.overrideSelector(viewerStateSelectedTemplateSelector, {})
+            mockStore.overrideSelector(viewerStateSelectedParcellationSelector, {})
+          })
+
+          it('> calls getMultiNgIdsRegionsLabelIndexMapReturn', () => {
+            const service = TestBed.inject(NehubaLayerControlService)
+            service.setColorMap$.subscribe()
+            expect(getMultiNgIdsRegionsLabelIndexMapSpy).toHaveBeenCalled()
+          })
+
+          it('> emitted value is as expected', () => {
+            const map = new Map<number, layerCtrlUtil.IRegion>()
+            getMultiNgIdsRegionsLabelIndexMapReturnVal.set(
+              'foo-bar',
+              map
+            )
+            map.set(1, {
+              ngId: 'foo-bar',
+              rgb: [100, 200, 255]
+            })
+            map.set(2, {
+              ngId: 'foo-bar',
+              rgb: [15, 15, 15]
+            })
+
+            const service = TestBed.inject(NehubaLayerControlService)
+            expect(
+              service.setColorMap$
+            ).toBeObservable(
+              hot('a', {
+                a: {
+                  'foo-bar': {
+                    1: { red: 100, green: 200, blue: 255 },
+                    2: { red: 15, green: 15, blue: 15}
+                  }
+                }
+              })
+            )
+          })
+
+        })
+
+        describe('> template/parc has aux meshes', () => {
+          let tmplAuxMeshes = [{
+            name: 'foo-bar',
+            ngId: 'bazz',
+            labelIndicies: [1,2,3],
+            rgb: [100, 100, 100]
+          }, {
+            name: 'hello-world',
+            ngId: 'hello-world',
+            labelIndicies: [4,5,6],
+            rgb: [200, 200, 200]
+          }]
+          let parcAuxMeshes = [{
+            name: 'hello-world',
+            ngId: 'hello-world',
+            labelIndicies: [10,11,12],
+            rgb: [255, 255, 255]
+          }]
+          beforeEach(() => {
+            mockStore.overrideSelector(viewerStateSelectedTemplateSelector, {
+              auxMeshes: tmplAuxMeshes
+            })
+            mockStore.overrideSelector(viewerStateSelectedParcellationSelector, {
+              auxMeshes: parcAuxMeshes
+            })
+          })
+
+          it('> should inherit values from tmpl and parc', () => {
+
+            const service = TestBed.inject(NehubaLayerControlService)
+            expect(
+              service.setColorMap$
+            ).toBeObservable(
+              hot('a', {
+                a: {
+                  'bazz': {
+                    1: { red: 100, green: 100, blue: 100 },
+                    2: { red: 100, green: 100, blue: 100 },
+                    3: { red: 100, green: 100, blue: 100 },
+                  },
+                  'hello-world': {
+                    4: { red: 200, green: 200, blue: 200 },
+                    5: { red: 200, green: 200, blue: 200 },
+                    6: { red: 200, green: 200, blue: 200 },
+                    10: { red: 255, green: 255, blue: 255 },
+                    11: { red: 255, green: 255, blue: 255 },
+                    12: { red: 255, green: 255, blue: 255 },
+                  }
+                }
+              })
+            )
+          })
+
+          it('> should overwrite any value if at all, from region', () => {
+            const map = new Map<number, layerCtrlUtil.IRegion>()
+            map.set(10, {
+              ngId: 'hello-world',
+              rgb: [0, 0, 0]
+            })
+            map.set(15, {
+              ngId: 'hello-world',
+              rgb: [0, 0, 0]
+            })
+            getMultiNgIdsRegionsLabelIndexMapReturnVal.set('hello-world', map)
+
+            const service = TestBed.inject(NehubaLayerControlService)
+            expect(
+              service.setColorMap$
+            ).toBeObservable(
+              hot('a', {
+                a: {
+                  'bazz': {
+                    1: { red: 100, green: 100, blue: 100 },
+                    2: { red: 100, green: 100, blue: 100 },
+                    3: { red: 100, green: 100, blue: 100 },
+                  },
+                  'hello-world': {
+                    4: { red: 200, green: 200, blue: 200 },
+                    5: { red: 200, green: 200, blue: 200 },
+                    6: { red: 200, green: 200, blue: 200 },
+                    10: { red: 255, green: 255, blue: 255 },
+                    11: { red: 255, green: 255, blue: 255 },
+                    12: { red: 255, green: 255, blue: 255 },
+                    15: { red: 0, green: 0, blue: 0 },
+                  }
+                }
+              })
+            )
+          })
+        })
+      })
+    
+      describe('> overwriteColorMap$ firing', () => {
+        beforeEach(() => {
+          mockStore.overrideSelector(viewerStateSelectedTemplateSelector, {})
+          mockStore.overrideSelector(viewerStateSelectedParcellationSelector, {})
+          const map = new Map<number, layerCtrlUtil.IRegion>()
+          getMultiNgIdsRegionsLabelIndexMapReturnVal.set(
+            'foo-bar',
+            map
+          )
+          map.set(1, {
+            ngId: 'foo-bar',
+            rgb: [100, 200, 255]
+          })
+          map.set(2, {
+            ngId: 'foo-bar',
+            rgb: [15, 15, 15]
+          })
+        })
+
+        it('> should overwrite existing colormap', () => {
+          const service = TestBed.inject(NehubaLayerControlService)
+          service.overwriteColorMap$.next({
+            'foo-bar': {
+              2: {
+                red: 255,
+                green: 255,
+                blue: 255,
+              }
+            }
+          })
+
+          expect(service.setColorMap$).toBeObservable(
+            hot('(ab)', {
+              a: {
+                'foo-bar': {
+                  1: { red: 100, green: 200, blue: 255 },
+                  2: { red: 15, green: 15, blue: 15 },
+                }
+              },
+              b: {
+                'foo-bar': {
+                  2: { red: 255, green: 255, blue: 255 },
+                }
+              }
+            })
+          )
+        })
+      })
+    })
+
+
+    describe('> visibleLayer$', () => {
+      beforeEach(() => {
+        mockStore.overrideSelector(viewerStateSelectedTemplateSelector, {
+          ngId: 'tmplNgId',
+          auxMeshes: [{
+            ngId: 'tmplAuxId1',
+            labelIndicies: [1,2,3]
+          },{
+            ngId: 'tmplAuxId2',
+            labelIndicies: [1,2,3]
+          }]
+        })
+
+        mockStore.overrideSelector(viewerStateSelectedParcellationSelector, {
+          auxMeshes: [{
+            ngId: 'parcAuxId1',
+            labelIndicies: [1,2,3],
+          },{
+            ngId: 'parcAuxId2',
+            labelIndicies: [1,2,3]
+          }]
+        })
+
+        getMultiNgIdsRegionsLabelIndexMapReturnVal.set(
+          'regionsNgId1', null
+        )
+
+        getMultiNgIdsRegionsLabelIndexMapReturnVal.set(
+          'regionsNgId2', null
+        )
+      })
+      it('> combines ngId of template, aux mesh and regions', () => {
+        const service = TestBed.inject(NehubaLayerControlService)
+        expect(service.visibleLayer$).toBeObservable(hot('a', {
+          a: [
+            'tmplNgId',
+            'tmplAuxId1',
+            'tmplAuxId2',
+            'parcAuxId1',
+            'parcAuxId2',
+            'regionsNgId1',
+            'regionsNgId2',
+          ]
+        }))
+      })
+    })
+  })
+})
diff --git a/src/viewerModule/nehuba/layerCtrl.service/layerCtrl.service.ts b/src/viewerModule/nehuba/layerCtrl.service/layerCtrl.service.ts
new file mode 100644
index 0000000000000000000000000000000000000000..7a338c72e24a09592fdc718d5064687e7d67a6db
--- /dev/null
+++ b/src/viewerModule/nehuba/layerCtrl.service/layerCtrl.service.ts
@@ -0,0 +1,139 @@
+import { Injectable } from "@angular/core";
+import { select, Store } from "@ngrx/store";
+import { BehaviorSubject, combineLatest, merge, Observable, Subject } from "rxjs";
+import { filter, map, shareReplay, tap } from "rxjs/operators";
+import { viewerStateSelectedParcellationSelector, viewerStateSelectedTemplateSelector } from "src/services/state/viewerState/selectors";
+import { getRgb, IColorMap } from "./layerCtrl.util";
+import { getMultiNgIdsRegionsLabelIndexMap } from "../constants";
+import { IAuxMesh } from '../store'
+
+export function getAuxMeshesAndReturnIColor(auxMeshes: IAuxMesh[]): IColorMap{
+  const returnVal: IColorMap = {}
+  for (const auxMesh of auxMeshes as IAuxMesh[]) {
+    const { ngId, labelIndicies, rgb } = auxMesh
+    const auxMeshColorMap = returnVal[ngId] || {}
+    for (const lblIdx of labelIndicies) {
+      auxMeshColorMap[lblIdx as number] = {
+        red: rgb[0] as number,
+        green: rgb[1] as number,
+        blue: rgb[2] as number,
+      }
+    }
+    returnVal[ngId] = auxMeshColorMap
+  }
+  return returnVal
+}
+
+@Injectable()
+export class NehubaLayerControlService {
+
+  private selectedParcellation$ = this.store$.pipe(
+    select(viewerStateSelectedParcellationSelector)
+  )
+
+  private selectedTemplateSelector$ = this.store$.pipe(
+    select(viewerStateSelectedTemplateSelector)
+  )
+
+  private selParcNgIdMap$ = this.selectedParcellation$.pipe(
+    map(parc => getMultiNgIdsRegionsLabelIndexMap(parc)),
+    shareReplay(1),
+  )
+  
+  private activeColorMap$: Observable<IColorMap> = combineLatest([
+    this.selParcNgIdMap$.pipe(
+      map(map => {
+        const returnVal: IColorMap = {}
+        for (const [ key, val ] of map.entries()) {
+          returnVal[key] = {}
+          for (const [ lblIdx, region ] of val.entries()) {
+            const rgb = getRgb(lblIdx, region)
+            returnVal[key][lblIdx] = rgb
+          }
+        }
+        return returnVal
+      })
+    ),
+    this.selectedTemplateSelector$.pipe(
+      map(template => {
+        const { auxMeshes = [] } = template
+        return getAuxMeshesAndReturnIColor(auxMeshes)
+      })
+    ),
+    this.selectedParcellation$.pipe(
+      map(parc => {
+        const { auxMeshes = [] } = parc
+        return getAuxMeshesAndReturnIColor(auxMeshes)
+      })
+    ),
+  ]).pipe(
+    map(([ regions, ...auxMeshesArr ]) => {
+      
+      const returnVal: IColorMap = {}
+
+      for (const key in regions) {
+        returnVal[key] = regions[key]
+      }
+
+      for (const auxMeshes of auxMeshesArr) {
+        for (const key in auxMeshes) {
+          const existingObj = returnVal[key] || {}
+          returnVal[key] = {
+            ...existingObj,
+            ...auxMeshes[key],
+          }
+        }
+      }
+      this.activeColorMap = returnVal
+      return returnVal
+    })
+  )
+
+  private auxMeshes$: Observable<IAuxMesh[]> = combineLatest([
+    this.selectedTemplateSelector$,
+    this.selectedParcellation$,
+  ]).pipe(
+    map(([ tmpl, parc ]) => {
+      const { auxMeshes: tmplAuxMeshes = [] as IAuxMesh[] } = tmpl
+      const { auxMeshes: parclAuxMeshes = [] as IAuxMesh[] } = parc
+      return [...tmplAuxMeshes, ...parclAuxMeshes]
+    })
+  )
+
+  constructor(
+    private store$: Store<any>,
+  ){
+
+  }
+
+  public activeColorMap: IColorMap
+
+  public overwriteColorMap$ = new BehaviorSubject<IColorMap>(null)
+
+  public setColorMap$: Observable<IColorMap> = merge(
+    this.activeColorMap$,
+    this.overwriteColorMap$.pipe(
+      filter(v => !!v)
+    )
+  )
+
+  public visibleLayer$: Observable<string[]> = combineLatest([
+    this.selectedTemplateSelector$,
+    this.auxMeshes$,
+    this.selParcNgIdMap$
+  ]).pipe(
+    map(([ tmpl, auxMeshes, parcNgIdMap ]) => {
+      const ngIdSet = new Set<string>()
+      const { ngId } = tmpl
+      ngIdSet.add(ngId)
+      for (const auxMesh of auxMeshes) {
+        const { ngId } = auxMesh
+        ngIdSet.add(ngId as string)
+      }
+      for (const ngId of parcNgIdMap.keys()) {
+        ngIdSet.add(ngId)
+      }
+      return Array.from(ngIdSet)
+    })
+  )
+}
diff --git a/src/viewerModule/nehuba/layerCtrl.service/layerCtrl.util.spec.ts b/src/viewerModule/nehuba/layerCtrl.service/layerCtrl.util.spec.ts
new file mode 100644
index 0000000000000000000000000000000000000000..62aa8819cf104fcd966663ed3b39d3b860ea6f63
--- /dev/null
+++ b/src/viewerModule/nehuba/layerCtrl.service/layerCtrl.util.spec.ts
@@ -0,0 +1,70 @@
+import * as util from 'common/util'
+import { getRgb } from './layerCtrl.util'
+
+describe('> layerCtrl.util.ts', () => {
+  describe('> #getRgb', () => {
+    let strToRgbSpy: jasmine.Spy
+    let strToRgbValue: [number, number, number]
+    beforeEach(() => {
+      strToRgbSpy = spyOn(util, 'strToRgb')
+      strToRgbValue = [1,2,3]
+      strToRgbSpy.and.returnValue(strToRgbValue)
+    })
+
+    describe('> region has rgb defined', () => {
+      const labelIndex = 1020
+      const region = {
+        ngId: 'foo-bar',
+        rgb: [100, 200, 255] as [number, number, number]
+      }
+      it('> should return region rgb', () => {
+        expect(
+          getRgb(labelIndex, region)
+        ).toEqual({
+          red: 100,
+          green: 200,
+          blue: 255
+        })
+      })
+    })
+
+    describe('> if region does not have rgb defined', () => {
+      describe('> if labelIndex > 65500', () => {
+        const region = {
+          ngId: 'foo-bar',
+        }
+        const labelIndex = 65535
+        it('> should return white', () => {
+          expect(
+            getRgb(labelIndex, region)
+          ).toEqual({
+            red: 255,
+            green: 255,
+            blue: 255
+          })
+        })
+      })
+
+      describe('> otherwise', () => {
+        const region = {
+          ngId: 'foo-bar',
+        }
+        const labelIndex = 12
+        it('> should call strToRgb', () => {
+          getRgb(labelIndex, region)
+          expect(strToRgbSpy).toHaveBeenCalledWith(`${region.ngId}${labelIndex}`)
+        })
+
+        it('> returns what strToRgb returns', () => {
+          expect(
+            getRgb(labelIndex, region)
+          ).toEqual({
+            red: 1,
+            green: 2,
+            blue: 3
+          })
+        })
+      })
+    })
+  })
+})
\ No newline at end of file
diff --git a/src/viewerModule/nehuba/layerCtrl.service/layerCtrl.util.ts b/src/viewerModule/nehuba/layerCtrl.service/layerCtrl.util.ts
new file mode 100644
index 0000000000000000000000000000000000000000..9ad22f97de5527b7620985ae1ad72f6d0ad4947c
--- /dev/null
+++ b/src/viewerModule/nehuba/layerCtrl.service/layerCtrl.util.ts
@@ -0,0 +1,40 @@
+import { InjectionToken } from '@angular/core'
+import { strToRgb } from 'common/util'
+import { Observable } from 'rxjs'
+
+export interface IColorMap {
+  [key: string]: {
+    [key: number]: {
+      red: number
+      green: number
+      blue: number
+    }
+  }
+}
+
+export function getRgb(labelIndex: number, region: { rgb?: [number, number, number], ngId: string }): {red: number, green: number, blue: number} {
+  const { rgb, ngId } = region
+  if (typeof rgb === 'undefined' || rgb === null) {
+    if (labelIndex > 65500) {
+      return {
+        red: 255,
+        green: 255,
+        blue: 255
+      }
+    }
+    const arr = strToRgb(`${ngId}${labelIndex}`)
+    return {
+      red : arr[0],
+      green: arr[1],
+      blue : arr[2],
+    }
+  }
+  return {
+    red : rgb[0],
+    green: rgb[1],
+    blue : rgb[2],
+  }
+}
+
+export const SET_COLORMAP_OBS = new InjectionToken<Observable<IColorMap>>('SET_COLORMAP_OBS')
+export const SET_LAYER_VISIBILITY = new InjectionToken<Observable<string[]>>('SET_LAYER_VISIBILITY')
diff --git a/src/viewerModule/nehuba/mesh.service/index.ts b/src/viewerModule/nehuba/mesh.service/index.ts
new file mode 100644
index 0000000000000000000000000000000000000000..eba47eb2549b4fa67a698e4a002e9c570fe10a8a
--- /dev/null
+++ b/src/viewerModule/nehuba/mesh.service/index.ts
@@ -0,0 +1,3 @@
+export {
+  NehubaMeshService
+} from './mesh.service'
diff --git a/src/viewerModule/nehuba/mesh.service.spec.ts b/src/viewerModule/nehuba/mesh.service/mesh.service.spec.ts
similarity index 83%
rename from src/viewerModule/nehuba/mesh.service.spec.ts
rename to src/viewerModule/nehuba/mesh.service/mesh.service.spec.ts
index fa5d5002bdaa17613a897d65cdff68221d3228a0..967762e46acb61182a31dfc625772c14da8a2dca 100644
--- a/src/viewerModule/nehuba/mesh.service.spec.ts
+++ b/src/viewerModule/nehuba/mesh.service/mesh.service.spec.ts
@@ -1,7 +1,8 @@
 import { TestBed } from "@angular/core/testing"
 import { MockStore, provideMockStore } from "@ngrx/store/testing"
 import { hot } from "jasmine-marbles"
-import { viewerStateSelectedParcellationSelector, viewerStateSelectedRegionsSelector } from "src/services/state/viewerState/selectors"
+import { viewerStateSelectedParcellationSelector, viewerStateSelectedRegionsSelector, viewerStateSelectedTemplateSelector } from "src/services/state/viewerState/selectors"
+import { selectorAuxMeshes } from "../store"
 import { getLayerNameIndiciesFromParcRs, collateLayerNameIndicies, findFirstChildrenWithLabelIndex, NehubaMeshService } from "./mesh.service"
 
 
@@ -125,6 +126,9 @@ describe('> mesh.server.ts', () => {
           NehubaMeshService,
         ]
       })
+      const mockStore = TestBed.inject(MockStore)
+      mockStore.overrideSelector(viewerStateSelectedParcellationSelector, {})
+      mockStore.overrideSelector(viewerStateSelectedTemplateSelector, {})
     })
 
     it('> can be init', () => {
@@ -134,20 +138,34 @@ describe('> mesh.server.ts', () => {
 
     it('> mixes in auxillaryMeshIndices', () => {
       const mockStore = TestBed.inject(MockStore)
-      mockStore.overrideSelector(viewerStateSelectedParcellationSelector, {
-        auxillaryMeshIndices: [11, 22]
-      })
       mockStore.overrideSelector(viewerStateSelectedRegionsSelector, [ fits1 ])
+
+      mockStore.overrideSelector(selectorAuxMeshes, [{
+        ngId: fits2.ngId,
+        labelIndicies: [11, 22],
+        "@id": '',
+        name: '',
+        rgb: [100, 100, 100],
+        visible: true,
+        displayName: ''
+      }])
+
       const service = TestBed.inject(NehubaMeshService)
       expect(
         service.loadMeshes$
       ).toBeObservable(
-        hot('a', {
+        hot('(ab)', {
           a: {
             layer: {
               name: fits1.ngId
             },
-            labelIndicies: [ fits1.labelIndex, 11, 22 ]
+            labelIndicies: [ fits1.labelIndex ]
+          },
+          b: {
+            layer: {
+              name: fits2.ngId,
+            },
+            labelIndicies: [11, 22]
           }
         })
       )
diff --git a/src/viewerModule/nehuba/mesh.service.ts b/src/viewerModule/nehuba/mesh.service/mesh.service.ts
similarity index 62%
rename from src/viewerModule/nehuba/mesh.service.ts
rename to src/viewerModule/nehuba/mesh.service/mesh.service.ts
index 007aedaa559a035306d1e73ed71f34a580a19d28..d991aff9e9bafc856dcd6d00cd058681f8d66eac 100644
--- a/src/viewerModule/nehuba/mesh.service.ts
+++ b/src/viewerModule/nehuba/mesh.service/mesh.service.ts
@@ -2,9 +2,10 @@ import { Injectable, OnDestroy } from "@angular/core";
 import { select, Store } from "@ngrx/store";
 import { combineLatest, Observable, of } from "rxjs";
 import { switchMap } from "rxjs/operators";
-import { viewerStateSelectedParcellationSelector, viewerStateSelectedRegionsSelector } from "src/services/state/viewerState/selectors";
-import { IMeshesToLoad } from './constants'
+import { viewerStateSelectedParcellationSelector, viewerStateSelectedRegionsSelector, viewerStateSelectedTemplateSelector } from "src/services/state/viewerState/selectors";
+import { IMeshesToLoad } from '../constants'
 import { flattenReducer } from 'common/util'
+import { IAuxMesh, selectorAuxMeshes, actionSetAuxMeshes } from "../store";
 
 interface IRegion {
   ngId?: string
@@ -63,13 +64,29 @@ export class NehubaMeshService implements OnDestroy {
   constructor(
     private store$: Store<any>
   ){
-
+    const auxMeshSub = combineLatest([
+      this.selectedTemplate$,
+      this.selectedParc$
+    ]).subscribe(([ tmpl, parc ]) => {
+      const { auxMeshes: tmplAuxMeshes = [] as IAuxMesh[] } = tmpl || {}
+      const { auxMeshes: parcAuxMeshes = [] as IAuxMesh[]} = parc || {}
+      this.store$.dispatch(
+        actionSetAuxMeshes({
+          payload: [...tmplAuxMeshes, ...parcAuxMeshes]
+        })
+      )
+    })
+    this.onDestroyCb.push(() => auxMeshSub.unsubscribe())
   }
 
   ngOnDestroy(){
     while(this.onDestroyCb.length > 0) this.onDestroyCb.pop()()
   }
 
+  private selectedTemplate$ = this.store$.pipe(
+    select(viewerStateSelectedTemplateSelector)
+  )
+
   private selectedRegions$ = this.store$.pipe(
     select(viewerStateSelectedRegionsSelector)
   )
@@ -78,11 +95,16 @@ export class NehubaMeshService implements OnDestroy {
     select(viewerStateSelectedParcellationSelector)
   )
 
+  private auxMeshes$ = this.store$.pipe(
+    select(selectorAuxMeshes),
+  )
+
   public loadMeshes$: Observable<IMeshesToLoad> = combineLatest([
+    this.auxMeshes$,
     this.selectedParc$,
     this.selectedRegions$,
   ]).pipe(
-    switchMap(([parc, selRegions]) => {
+    switchMap(([auxMeshes, parc, selRegions]) => {
       const obj = getLayerNameIndiciesFromParcRs(parc, selRegions)
       const { auxillaryMeshIndices = [] } = parc
       const arr: IMeshesToLoad[] = []
@@ -95,6 +117,29 @@ export class NehubaMeshService implements OnDestroy {
           labelIndicies
         })
       }
+      
+      const auxLayers: {
+        [key: string]: number[]
+      } = {}
+
+      for (const auxMesh of auxMeshes) {
+        const { name, ngId, labelIndicies } = auxMesh
+        if (!auxLayers[ngId]) {
+          auxLayers[ngId] = []
+        }
+        if (auxMesh.visible) {
+          auxLayers[ngId].push(...labelIndicies)
+        }
+      }
+      for (const key in auxLayers) {
+        arr.push({
+          layer: {
+            name: key
+          },
+          labelIndicies: auxLayers[key]
+        })
+      }
+
       return of(...arr)
     }),
   )
diff --git a/src/viewerModule/nehuba/module.ts b/src/viewerModule/nehuba/module.ts
index b0bdeec6eef7d448804954174d8d7e9f65866447..e4a6808a53f84691b01e8f8bd5ff1489fa3dc4a3 100644
--- a/src/viewerModule/nehuba/module.ts
+++ b/src/viewerModule/nehuba/module.ts
@@ -23,6 +23,7 @@ import { FormsModule, ReactiveFormsModule } from "@angular/forms";
 import { BehaviorSubject } from "rxjs";
 import { StateModule } from "src/state";
 import { AuthModule } from "src/auth";
+import { ViewerCtrlModule } from "./viewerCtrl";
 
 @NgModule({
   imports: [
@@ -36,6 +37,7 @@ import { AuthModule } from "src/auth";
     ComponentsModule,
     MouseoverModule,
     ShareModule,
+    ViewerCtrlModule,
 
     /**
      * should probably break this into its own...
diff --git a/src/viewerModule/nehuba/navigation.service/index.ts b/src/viewerModule/nehuba/navigation.service/index.ts
new file mode 100644
index 0000000000000000000000000000000000000000..ac47740ee69a641d7ef23ed05e27eeb80a945824
--- /dev/null
+++ b/src/viewerModule/nehuba/navigation.service/index.ts
@@ -0,0 +1,7 @@
+export {
+  NehubaNavigationService
+} from './navigation.service'
+
+export {
+  INavObj
+} from './navigation.util'
diff --git a/src/viewerModule/nehuba/navigation.service.spec.ts b/src/viewerModule/nehuba/navigation.service/navigation.service.spec.ts
similarity index 97%
rename from src/viewerModule/nehuba/navigation.service.spec.ts
rename to src/viewerModule/nehuba/navigation.service/navigation.service.spec.ts
index 34c97ad1252f633d96fee18955e203f07876ebab..9fdde1ebbab0cd2c3a8d71c01d935d9b175b897c 100644
--- a/src/viewerModule/nehuba/navigation.service.spec.ts
+++ b/src/viewerModule/nehuba/navigation.service/navigation.service.spec.ts
@@ -4,8 +4,8 @@ import { BehaviorSubject, of, Subject } from 'rxjs'
 import { selectViewerConfigAnimationFlag } from 'src/services/state/viewerConfig/selectors'
 import { viewerStateSelectorNavigation } from 'src/services/state/viewerState/selectors'
 import * as NavUtil from './navigation.util'
-import { NehubaViewerUnit } from './nehubaViewer/nehubaViewer.component'
-import { NEHUBA_INSTANCE_INJTKN } from './util'
+import { NehubaViewerUnit } from '../nehubaViewer/nehubaViewer.component'
+import { NEHUBA_INSTANCE_INJTKN } from '../util'
 import { NehubaNavigationService } from './navigation.service'
 
 const nav1 = {
diff --git a/src/viewerModule/nehuba/navigation.service.ts b/src/viewerModule/nehuba/navigation.service/navigation.service.ts
similarity index 97%
rename from src/viewerModule/nehuba/navigation.service.ts
rename to src/viewerModule/nehuba/navigation.service/navigation.service.ts
index 4664a9255d1314f69221a9dcb09b6a7ca1dbbe9c..6d6e16b83ad5201ffe61770f93ce3db6806f7e73 100644
--- a/src/viewerModule/nehuba/navigation.service.ts
+++ b/src/viewerModule/nehuba/navigation.service/navigation.service.ts
@@ -5,8 +5,8 @@ import { debounceTime } from "rxjs/operators";
 import { selectViewerConfigAnimationFlag } from "src/services/state/viewerConfig/selectors";
 import { viewerStateChangeNavigation } from "src/services/state/viewerState/actions";
 import { viewerStateSelectorNavigation } from "src/services/state/viewerState/selectors";
-import { NehubaViewerUnit } from "./nehubaViewer/nehubaViewer.component";
-import { NEHUBA_INSTANCE_INJTKN } from "./util";
+import { NehubaViewerUnit } from "../nehubaViewer/nehubaViewer.component";
+import { NEHUBA_INSTANCE_INJTKN } from "../util";
 import { timedValues } from 'src/util/generator'
 import { INavObj, navAdd, navMul, navObjEqual } from './navigation.util'
 
diff --git a/src/viewerModule/nehuba/navigation.util.spec.ts b/src/viewerModule/nehuba/navigation.service/navigation.util.spec.ts
similarity index 100%
rename from src/viewerModule/nehuba/navigation.util.spec.ts
rename to src/viewerModule/nehuba/navigation.service/navigation.util.spec.ts
diff --git a/src/viewerModule/nehuba/navigation.util.ts b/src/viewerModule/nehuba/navigation.service/navigation.util.ts
similarity index 100%
rename from src/viewerModule/nehuba/navigation.util.ts
rename to src/viewerModule/nehuba/navigation.service/navigation.util.ts
diff --git a/src/viewerModule/nehuba/nehubaViewer/nehubaViewer.component.spec.ts b/src/viewerModule/nehuba/nehubaViewer/nehubaViewer.component.spec.ts
index 451dcbdd7af2a58560cdb978096f3b636f3ec9a3..7faa79281c19f9f82c5d0a0910ec9b856aede274 100644
--- a/src/viewerModule/nehuba/nehubaViewer/nehubaViewer.component.spec.ts
+++ b/src/viewerModule/nehuba/nehubaViewer/nehubaViewer.component.spec.ts
@@ -1,17 +1,89 @@
-import { TestBed, async, fakeAsync, tick } from "@angular/core/testing"
+import { TestBed, async, fakeAsync, tick, ComponentFixture } from "@angular/core/testing"
 import { CommonModule, DOCUMENT } from "@angular/common"
-import { NehubaViewerUnit, IMPORT_NEHUBA_INJECT_TOKEN } from "./nehubaViewer.component"
+import { NehubaViewerUnit, IMPORT_NEHUBA_INJECT_TOKEN, scanFn } from "./nehubaViewer.component"
 import { importNehubaFactory } from "../util"
 import { AtlasWorkerService } from "src/atlasViewer/atlasViewer.workerService.service"
-import { LoggingModule } from "src/logging"
+import { LoggingModule, LoggingService } from "src/logging"
 import { APPEND_SCRIPT_TOKEN, appendScriptFactory } from "src/util/constants"
 import { IMeshesToLoad, SET_MESHES_TO_LOAD } from "../constants"
-import { Subject } from "rxjs"
+import { ReplaySubject, Subject } from "rxjs"
+import { IColorMap, SET_COLORMAP_OBS, SET_LAYER_VISIBILITY } from "../layerCtrl.service"
 
-describe('nehubaViewer.component,ts', () => {
-  describe('NehubaViewerUnit', () => {
-    let provideSetMeshToLoadCtrl = false
+describe('> nehubaViewer.component.ts', () => {
+  describe('> #scanFn', () => {
+
+    const curr = {
+      layer: {
+        name: 'foo-bar'
+      },
+      labelIndicies: [1,2,3]
+    }
+
+    describe('> insert OP', () => {
+      describe('> if incoming is empty arr', () => {
+        const acc = []
+        it('> should insert', () => {
+          expect(
+            scanFn(acc, curr)
+          ).toEqual([curr])
+        })
+      })
+
+      describe('> if incoming has other key', () => {
+        it('> should insert', () => {
+          const acc = [{
+            layer: {
+              name: 'hello-world'
+            },
+            labelIndicies: [4,5,6]
+          }]
+          expect(
+            scanFn(acc, curr)
+          ).toEqual([
+            ...acc,
+            curr
+          ])
+        })
+      })
+    })
+
+    describe('> update OP', () => {
+      const acc = [{
+        layer: {
+          name: 'hello-world'
+        },
+        labelIndicies: [4,5,6]
+      }, {
+        layer: {
+          name: 'foo-bar',
+        },
+        labelIndicies: [1]
+      }]
+      it('> should update with same key', () => {
+        expect(
+          scanFn(acc, curr)
+        ).toEqual([{
+          layer: {
+            name: 'hello-world'
+          },
+          labelIndicies: [4,5,6]
+        }, {
+          layer: {
+            name: 'foo-bar',
+          },
+          labelIndicies: [1,2,3]
+        }])
+      })
+    })
+  })
+
+  describe('> NehubaViewerUnit', () => {
+    let provideSetMeshToLoadCtrl = true
+    let provideLayerVisibility = true
+    let provideSetColorObs = true
     const setMeshToLoadCtl$ = new Subject<IMeshesToLoad>()
+    let setLayerVisibility$: Subject<string[]>
+    let setcolorMap$: Subject<IColorMap>
     beforeEach(async(() => {
       TestBed.configureTestingModule({
         imports: [
@@ -38,7 +110,26 @@ describe('nehubaViewer.component,ts', () => {
               ? setMeshToLoadCtl$
               : null
           },
+          {
+            provide: SET_LAYER_VISIBILITY,
+            useFactory: () => {
+              setLayerVisibility$ = provideLayerVisibility
+                ? new ReplaySubject(1)
+                : null
+              return setLayerVisibility$
+            } 
+          },
+          {
+            provide: SET_COLORMAP_OBS,
+            useFactory: () => {
+              setcolorMap$ = provideSetColorObs
+                ? new ReplaySubject(1)
+                : null
+              return setcolorMap$
+            }
+          },
           AtlasWorkerService,
+          LoggingService,
         ]
       }).compileComponents()
     }))
@@ -48,28 +139,6 @@ describe('nehubaViewer.component,ts', () => {
       expect(fixture.componentInstance).toBeTruthy()
     })
 
-    describe('> getters', () => {
-      it('> showLayersName is a combination of multiNgIdsLabelIndexMap key values and overrideShowLayers', () => {
-        const fixture = TestBed.createComponent(NehubaViewerUnit)
-        const overrideShowLayers = [
-          `test-1`,
-          `test-2`
-        ]
-        fixture.componentInstance.overrideShowLayers = overrideShowLayers
-        fixture.componentInstance.multiNgIdsLabelIndexMap = new Map([
-          ['test-3', new Map()]
-        ])
-
-        fixture.detectChanges()
-
-        expect(fixture.componentInstance.showLayersName).toEqual([
-          `test-1`,
-          `test-2`,
-          `test-3`
-        ])
-      })
-    })
-
     describe('> on create', () => {
       it('> calls onInit lifecycle param properly', () => {
         const onInitSpy = jasmine.createSpy('onInit')
@@ -98,7 +167,12 @@ describe('nehubaViewer.component,ts', () => {
           }
   
           fixture.detectChanges()
-          fixture.componentInstance['loadMeshes']([1,2,3], { name: 'foo-bar' })
+          fixture.componentInstance['loadMeshes$'].next({
+            layer: {
+              name: 'foo-bar'
+            },
+            labelIndicies: [1,2,3]
+          })
           tick(1000)
           expect(fixture.componentInstance.nehubaViewer.setMeshesToLoad).toHaveBeenCalledWith([1,2,3], { name: 'foo-bar' })
         }))
@@ -117,7 +191,12 @@ describe('nehubaViewer.component,ts', () => {
           }
   
           fixture.detectChanges()
-          fixture.componentInstance['loadMeshes']([1,2,3], { name: 'foo-bar' })
+          fixture.componentInstance['loadMeshes$'].next({
+            layer: {
+              name: 'foo-bar'
+            },
+            labelIndicies: [1,2,3]
+          })
           tick(1000)
           expect(fixture.componentInstance.nehubaViewer.setMeshesToLoad).not.toHaveBeenCalledWith([1,2,3], { name: 'foo-bar' })
         }))
@@ -142,5 +221,196 @@ describe('nehubaViewer.component,ts', () => {
         }))
       })
     })
+
+    describe('> layer visibility', () => {
+      let nehubaViewerSpy: any
+      let managedLayersSpy: jasmine.Spy
+      let getLayerByNameSpy: jasmine.Spy
+      let managedLayer = {
+        setVisible: jasmine.createSpy()
+      }
+      let layerManager = {
+        get managedLayers() {
+          return []
+        },
+        getLayerByName(layerName: string){
+
+        }
+      }
+
+      afterEach(() => {
+        managedLayer.setVisible.calls.reset()
+      })
+      beforeEach(() => {
+        managedLayersSpy = spyOnProperty(layerManager, 'managedLayers')
+        managedLayersSpy.and.returnValue([ managedLayer ])
+        getLayerByNameSpy = spyOn(layerManager, 'getLayerByName')
+        getLayerByNameSpy.and.callThrough()
+        
+        nehubaViewerSpy = {
+          ngviewer: {
+            layerManager
+          },
+          dispose: () => {}
+        }
+
+        provideLayerVisibility = true
+      })
+
+      it('> if provided obs does not emit, does not call manage layers', fakeAsync(() => {
+        const fixture = TestBed.createComponent(NehubaViewerUnit)
+        fixture.componentInstance.nehubaViewer = nehubaViewerSpy
+        fixture.detectChanges()
+        tick(320)
+        expect(managedLayersSpy).not.toHaveBeenCalled()
+      }))
+
+      describe('> if provided obs does emit', () => {
+
+        const setup = (emit = []) => {
+          const fixture = TestBed.createComponent(NehubaViewerUnit)
+          setLayerVisibility$.next(emit)
+          fixture.componentInstance.nehubaViewer = nehubaViewerSpy
+          fixture.detectChanges()
+          tick(640)
+        }
+        describe('> emits []', () => {
+          it('> call manage layers', fakeAsync(() => {
+            setup()
+            expect(managedLayersSpy).toHaveBeenCalled()
+          }))
+          it('> layers have visibility set off', fakeAsync(() => {
+            setup()
+            expect(managedLayer.setVisible).toHaveBeenCalledWith(false)
+          }))
+        })
+
+        describe('> emits ["something"]', () => {
+          it('> calls getLayerByname',fakeAsync(() => {
+            setup(['something'])
+            expect(layerManager.getLayerByName).toHaveBeenCalledWith('something')
+          }))
+
+          it('> if returns layer, expects setVisible to be called', fakeAsync(() => {
+            const layer = {
+              setVisible: jasmine.createSpy()
+            }
+            getLayerByNameSpy.and.returnValue(layer)
+            setup(['something'])
+            expect(layer.setVisible).toHaveBeenCalledWith(true)
+          }))
+        })
+      })
+    })
+
+    describe('> colorMap obs', () => {
+
+      let prvSetCMSpy: jasmine.Spy
+      const setup = () => {
+
+        const fixture = TestBed.createComponent(NehubaViewerUnit)
+        fixture.detectChanges()
+        prvSetCMSpy = spyOn<any>(fixture.componentInstance, 'setColorMap').and.callFake(() => {})
+      }
+
+      beforeEach(() => {
+        provideSetColorObs = true
+      })
+      it('> if obs does not emit, does not call setcolormap', fakeAsync(() => {
+        setup()
+        tick(320)
+        expect(prvSetCMSpy).not.toHaveBeenCalled()
+      }))
+
+      describe('> if obs does emit', () => {
+        it('> setcolormap gets called', fakeAsync(() => {
+          setup()
+          setcolorMap$.next({
+            'foo-bar': {
+              1: { red: 100, green: 100, blue: 100 },
+              2: { red: 200, green: 200, blue: 200 },
+            },
+            'hello-world': {
+              1: { red: 10, green: 10, blue: 10 },
+              2: { red: 20, green: 20, blue: 20 },
+            }
+          })
+          tick(320)
+          expect(prvSetCMSpy).toHaveBeenCalled()
+        }))
+
+        it('> call arg is as expected', fakeAsync(() => {
+          setup()
+          setcolorMap$.next({
+            'foo-bar': {
+              1: { red: 100, green: 100, blue: 100 },
+              2: { red: 200, green: 200, blue: 200 },
+            },
+            'hello-world': {
+              1: { red: 10, green: 10, blue: 10 },
+              2: { red: 20, green: 20, blue: 20 },
+            }
+          })
+          tick(320)
+          const map = new Map([
+            ['foo-bar', new Map([
+              ['1', { red: 100, green: 100, blue: 100 }],
+              ['2', { red: 200, green: 200, blue: 200 }],
+            ])],
+            ['hello-world', new Map([
+              ['1', { red: 10, green: 10, blue: 10 }],
+              ['2', { red: 20, green: 20, blue: 20 }],
+            ])]
+          ])
+
+          expect(prvSetCMSpy).toHaveBeenCalledWith(map)
+        }))
+      })
+    })
+
+    describe('> # setColorMap', () => {
+      let nehubaViewerSpy: any
+      beforeEach(() => {
+        nehubaViewerSpy = {
+          batchAddAndUpdateSegmentColors: jasmine.createSpy(),
+          dispose(){
+
+          }
+        }
+      })
+      it('> calls nehubaViewer.batchAddAndUpdateSegmentColors', () => {
+        const fixture = TestBed.createComponent(NehubaViewerUnit)
+        fixture.componentInstance.nehubaViewer = nehubaViewerSpy
+        fixture.detectChanges()
+
+        const mainMap = new Map<string, Map<number, { red: number, green: number, blue: number }>>()
+        const fooBarMap = new Map()
+        fooBarMap.set(1, {red: 100, green: 100, blue: 100})
+        fooBarMap.set(2, {red: 200, green: 200, blue: 200})
+        mainMap.set('foo-bar', fooBarMap)
+
+        const helloWorldMap = new Map()
+        helloWorldMap.set(1, {red: 10, green: 10, blue: 10})
+        helloWorldMap.set(2, {red: 20, green: 20, blue: 20})
+        mainMap.set('hello-world', helloWorldMap)
+
+        fixture.componentInstance['setColorMap'](mainMap)
+
+        expect(
+          nehubaViewerSpy.batchAddAndUpdateSegmentColors
+        ).toHaveBeenCalledTimes(2)
+
+        expect(nehubaViewerSpy.batchAddAndUpdateSegmentColors).toHaveBeenCalledWith(
+          fooBarMap,
+          { name: 'foo-bar' }
+        )
+
+        expect(nehubaViewerSpy.batchAddAndUpdateSegmentColors).toHaveBeenCalledWith(
+          helloWorldMap,
+          { name: 'hello-world' }
+        )
+      })
+    })
+
   })
 })
diff --git a/src/viewerModule/nehuba/nehubaViewer/nehubaViewer.component.ts b/src/viewerModule/nehuba/nehubaViewer/nehubaViewer.component.ts
index e6b84b64cfbbfa06f4b9ac2a381b67f85406a268..bf63d48d516ee607455f70beb4639910184fa00e 100644
--- a/src/viewerModule/nehuba/nehubaViewer/nehubaViewer.component.ts
+++ b/src/viewerModule/nehuba/nehubaViewer/nehubaViewer.component.ts
@@ -3,15 +3,15 @@ import { fromEvent, Subscription, ReplaySubject, BehaviorSubject, Observable, ra
 import { debounceTime, filter, map, scan, startWith, mapTo, switchMap, take, skip, tap } from "rxjs/operators";
 import { AtlasWorkerService } from "src/atlasViewer/atlasViewer.workerService.service";
 import { StateInterface as ViewerConfiguration } from "src/services/state/viewerConfig.store";
-
 import { LoggingService } from "src/logging";
-import { getExportNehuba, getViewer, setNehubaViewer } from "src/util/fn";
+import { getExportNehuba, getViewer, setNehubaViewer, switchMapWaitFor } from "src/util/fn";
+import { NEHUBA_INSTANCE_INJTKN, scanSliceViewRenderFn } from "../util";
+import { deserialiseParcRegionId } from 'common/util'
+import { IMeshesToLoad, SET_MESHES_TO_LOAD } from "../constants";
+import { IColorMap, SET_COLORMAP_OBS, SET_LAYER_VISIBILITY } from "../layerCtrl.service";
 
 import '!!file-loader?context=third_party&name=main.bundle.js!export-nehuba/dist/min/main.bundle.js'
 import '!!file-loader?context=third_party&name=chunk_worker.bundle.js!export-nehuba/dist/min/chunk_worker.bundle.js'
-import { NEHUBA_INSTANCE_INJTKN, scanSliceViewRenderFn } from "../util";
-import { strToRgb, deserialiseParcRegionId } from 'common/util'
-import { IMeshesToLoad, SET_MESHES_TO_LOAD } from "../constants";
 
 const NG_LANDMARK_LAYER_NAME = 'spatial landmark layer'
 const NG_USER_LANDMARK_LAYER_NAME = 'user landmark layer'
@@ -38,17 +38,18 @@ export interface INehubaLifecycleHook{
   onInit?: () => void
 }
 
-const scanFn: (acc: LayerLabelIndex[], curr: LayerLabelIndex) => LayerLabelIndex[] = (acc: LayerLabelIndex[], curr: LayerLabelIndex) => {
-  const { layer } = curr
-  const { name } = layer
-  const foundIndex = acc.findIndex(({ layer }) => layer.name === name)
-  if (foundIndex < 0) { return acc.concat(curr) } else { return acc.map((item, idx) => idx === foundIndex
-    ? {
-      ...item,
-      labelIndicies: [...new Set([...item.labelIndicies, ...curr.labelIndicies])],
-    }
-    : item)
+export const scanFn = (acc: LayerLabelIndex[], curr: LayerLabelIndex) => {
+  const found = acc.find(layerLabelIndex => {
+    return layerLabelIndex.layer.name === curr.layer.name
+  })
+  if (!found) {
+    return [ ...acc, curr ]
   }
+  return acc.map(layerLabelIndex => {
+    return layerLabelIndex.layer.name === curr.layer.name
+      ? curr
+      : layerLabelIndex
+  })
 }
 
 /**
@@ -66,12 +67,6 @@ export class NehubaViewerUnit implements OnInit, OnDestroy {
   private sliceviewLoading$: Observable<boolean>
 
   public overrideShowLayers: string[] = []
-  get showLayersName() {
-    return [
-      ...this.overrideShowLayers,
-      ...Array.from(this.multiNgIdsLabelIndexMap.keys())
-    ]
-  }
 
   public lifecycle: INehubaLifecycleHook
 
@@ -81,7 +76,6 @@ export class NehubaViewerUnit implements OnInit, OnDestroy {
   public mousePosInReal$ = new BehaviorSubject(null)
 
   private exportNehuba: any
-  private viewer: any
 
   private subscriptions: Subscription[] = []
 
@@ -119,7 +113,6 @@ export class NehubaViewerUnit implements OnInit, OnDestroy {
       : [1.5e9, 1.5e9, 1.5e9]
   }
 
-  public _s1$: any = null
   public _s2$: any = null
   public _s3$: any = null
   public _s4$: any = null
@@ -127,10 +120,8 @@ export class NehubaViewerUnit implements OnInit, OnDestroy {
   public _s6$: any = null
   public _s7$: any = null
   public _s8$: any = null
-  public _s9$: any = null
 
   public _s$: any[] = [
-    this._s1$,
     this._s2$,
     this._s3$,
     this._s4$,
@@ -138,7 +129,6 @@ export class NehubaViewerUnit implements OnInit, OnDestroy {
     this._s6$,
     this._s7$,
     this._s8$,
-    this._s9$,
   ]
 
   public ondestroySubscriptions: Subscription[] = []
@@ -150,6 +140,8 @@ export class NehubaViewerUnit implements OnInit, OnDestroy {
 
   public nehubaLoaded: boolean = false
 
+  public landmarksLoaded: boolean = false
+
   constructor(
     public elementRef: ElementRef,
     private workerService: AtlasWorkerService,
@@ -157,6 +149,8 @@ export class NehubaViewerUnit implements OnInit, OnDestroy {
     @Inject(IMPORT_NEHUBA_INJECT_TOKEN) getImportNehubaPr: () => Promise<any>,
     @Optional() @Inject(NEHUBA_INSTANCE_INJTKN) private nehubaViewer$: Subject<NehubaViewerUnit>,
     @Optional() @Inject(SET_MESHES_TO_LOAD) private injSetMeshesToLoad$: Observable<IMeshesToLoad>,
+    @Optional() @Inject(SET_COLORMAP_OBS) private setColormap$: Observable<IColorMap>,
+    @Optional() @Inject(SET_LAYER_VISIBILITY) private layerVis$: Observable<string[]>,
   ) {
 
     if (this.nehubaViewer$) {
@@ -185,6 +179,9 @@ export class NehubaViewerUnit implements OnInit, OnDestroy {
       })
       .catch(e => this.errorEmitter.emit(e))
 
+    /**
+     * TODO move to layerCtrl.service
+     */
     this.ondestroySubscriptions.push(
       fromEvent(this.workerService.worker, 'message').pipe(
         filter((message: any) => {
@@ -222,6 +219,9 @@ export class NehubaViewerUnit implements OnInit, OnDestroy {
       }),
     )
 
+    /**
+     * TODO move to layerCtrl.service
+     */
     this.ondestroySubscriptions.push(
       fromEvent(this.workerService.worker, 'message').pipe(
         filter((message: any) => {
@@ -251,6 +251,7 @@ export class NehubaViewerUnit implements OnInit, OnDestroy {
         debounceTime(100),
         map(e => e.data.url),
       ).subscribe(url => {
+        this.landmarksLoaded = !!url
         this.removeuserLandmarks()
 
         /**
@@ -260,13 +261,7 @@ export class NehubaViewerUnit implements OnInit, OnDestroy {
           /**
            * remove transparency from meshes in current layer(s)
            */
-          for (const layerKey of this.multiNgIdsLabelIndexMap.keys()) {
-            const layer = this.nehubaViewer.ngviewer.layerManager.getLayerByName(layerKey)
-            if (layer) {
-              layer.layer.displayState.objectAlpha.restoreState(1.0)
-            }
-          }
-  
+          this.setMeshTransparency(false)
           return
         }
         const _ = {}
@@ -280,18 +275,55 @@ export class NehubaViewerUnit implements OnInit, OnDestroy {
         /**
          * adding transparency to meshes in current layer(s)
          */
-        for (const layerKey of this.multiNgIdsLabelIndexMap.keys()) {
-          const layer = this.nehubaViewer.ngviewer.layerManager.getLayerByName(layerKey)
-          if (layer) {
-            layer.layer.displayState.objectAlpha.restoreState(0.2)
-          }
-        }
+        this.setMeshTransparency(true)
       }),
     )
-  }
+  
+    if (this.setColormap$) {
+      this.ondestroySubscriptions.push(
+        this.setColormap$.pipe(
+          debounceTime(160),
+        ).subscribe(v => {
+          const map = new Map()
+          for (const key in v) {
+            const m = new Map()
+            map.set(key, m)
+            for (const lblIdx in v[key]) {
+              m.set(lblIdx, v[key][lblIdx])
+            }
+          }
+          this.setColorMap(map)
+        })
+      )
+    } else {
+      this.log.error(`SET_COLORMAP_OBS not provided`)
+    }
 
-  private _baseUrlToParcellationIdMap: Map<string, string> = new Map()
-  private _baseUrls: string[] = []
+    if (this.layerVis$) {
+      this.ondestroySubscriptions.push(
+        this.layerVis$.pipe(
+          switchMap(switchMapWaitFor({ condition: () => !!(this.nehubaViewer?.ngviewer) })),
+          tap(() => {
+            const managedLayers = this.nehubaViewer.ngviewer.layerManager.managedLayers
+            managedLayers.forEach(layer => layer.setVisible(false))
+          }),
+          debounceTime(160),
+        ).subscribe((layerNames: string[]) => {
+
+          for (const layerName of layerNames) {
+            const layer = this.nehubaViewer.ngviewer.layerManager.getLayerByName(layerName)
+            if (layer) {
+              layer.setVisible(true)
+            } else {
+              this.log.log('layer unavailable', layerName)
+            }
+          }
+        })
+      )
+    } else {
+      this.log.error(`SET_LAYER_VISIBILITY not provided`)
+    }
+  }
 
   public numMeshesToBeLoaded: number = 0
 
@@ -313,25 +345,6 @@ export class NehubaViewerUnit implements OnInit, OnDestroy {
     this._templateId = id
   }
 
-  /** compatible with multiple parcellation id selection */
-  private _ngIds: string[] = []
-  get ngIds() {
-    return this._ngIds
-  }
-
-  set ngIds(val: string[]) {
-    this.createNehubaPromise
-      .then(() => {
-        this._ngIds.forEach(id => {
-          const oldlayer = this.nehubaViewer.ngviewer.layerManager.getLayerByName(id)
-          if (oldlayer) {oldlayer.setVisible(false) } else { this.log.warn('could not find old layer', id) }
-        })
-        this._ngIds = val
-        this.loadNewParcellation()
-        this.showAllSeg()
-      })
-  }
-
   public spatialLandmarkSelectionChanged(labels: number[]) {
     const getCondition = (label: number) => `if(label > ${label - 0.1} && label < ${label + 0.1} ){${FRAGMENT_EMIT_RED}}`
     const newShader = `void main(){ ${labels.map(getCondition).join('else ')}else {${FRAGMENT_EMIT_WHITE}} }`
@@ -351,6 +364,8 @@ export class NehubaViewerUnit implements OnInit, OnDestroy {
     }
   }
 
+  // TODO move region management to another service
+
   public multiNgIdsLabelIndexMap: Map<string, Map<number, any>> = new Map()
 
   public navPosReal: [number, number, number] = [0, 0, 0]
@@ -399,13 +414,6 @@ export class NehubaViewerUnit implements OnInit, OnDestroy {
      * Hide all layers except the base layer (template)
      * Then show the layers referenced in multiNgIdLabelIndexMap
      */
-    const managedLayers = this.nehubaViewer.ngviewer.layerManager.managedLayers
-    managedLayers.slice(1).forEach(layer => layer.setVisible(false))
-
-    for (const layerName of this.showLayersName) {
-      const layer = this.nehubaViewer.ngviewer.layerManager.getLayerByName(layerName)
-      if (layer) { layer.setVisible(true) } else { this.log.log('layer unavailable', layerName) }
-    }
 
     this.redraw()
 
@@ -771,23 +779,36 @@ export class NehubaViewerUnit implements OnInit, OnDestroy {
     this.nehubaViewer.ngviewer.navigationState.pose.rotateRelative(this.vec3([0, 0, 1]), amount / 4.0 * Math.PI / 180.0)
   }
 
-  /**
-   *
-   * @param arrayIdx label indices of the shown segment(s)
-   * @param ngId segmentation layer name
-   */
-  private updateColorMap(arrayIdx: number[], ngId: string) {
-    const set = new Set(arrayIdx)
-    const newColorMap = new Map(
-      Array.from(this.multiNgIdColorMap.get(ngId).entries())
-        .map(v => set.has(v[0]) || set.size === 0 ?
-          v :
-          [v[0], {red: 255, green: 255, blue: 255}]) as any,
-    )
+  public toggleOctantRemoval(flag?: boolean) {
+    const ctrl = this.nehubaViewer?.ngviewer?.showPerspectiveSliceViews
+    if (!ctrl) {
+      this.log.error(`toggleOctantRemoval failed. this.nehubaViewer.ngviewer?.showPerspectiveSliceViews returns falsy`)
+      return
+    }
+    const newVal = typeof flag === 'undefined'
+      ? !ctrl.value
+      : flag
+    ctrl.restoreState(newVal)
 
-    this.nehubaViewer.batchAddAndUpdateSegmentColors(newColorMap, {
-      name: ngId,
-    })
+    if (this.landmarksLoaded) {
+      /**
+       * showPerspectSliceView -> ! meshTransparency
+       */
+      this.setMeshTransparency(!newVal)
+    }
+  }
+
+  public setMeshTransparency(flag: boolean){
+
+    /**
+     * remove transparency from meshes in current layer(s)
+     */
+    for (const layerKey of this.multiNgIdsLabelIndexMap.keys()) {
+      const layer = this.nehubaViewer.ngviewer.layerManager.getLayerByName(layerKey)
+      if (layer) {
+        layer.layer.displayState.objectAlpha.restoreState(flag ? 0.2 : 1.0)
+      }
+    }
   }
 
   private newViewerInit() {
@@ -913,113 +934,22 @@ export class NehubaViewerUnit implements OnInit, OnDestroy {
 
   private loadNewParcellation() {
 
-    /* show correct segmentation layer */
-    this._baseUrls = []
-
-    this.ngIds.map(id => {
-      const newlayer = this.nehubaViewer.ngviewer.layerManager.getLayerByName(id)
-      if (newlayer) {newlayer.setVisible(true) } else { this.log.warn('could not find new layer', id) }
-
-      const regex = /^(\S.*?):\/\/(.*?)$/.exec(newlayer.sourceUrl)
-
-      if (!regex || !regex[2]) {
-        this.log.error('could not parse baseUrl')
-        return
-      }
-      if (regex[1] !== 'precomputed') {
-        this.log.error('sourceUrl is not precomputed')
-        return
-      }
-
-      const baseUrl = regex[2]
-      this._baseUrls.push(baseUrl)
-      this._baseUrlToParcellationIdMap.set(baseUrl, id)
-
-      const indicies = [
-        ...Array.from(this.multiNgIdsLabelIndexMap.get(id).keys()),
-        ...this.auxilaryMeshIndices,
-      ]
-      if (!this.injSetMeshesToLoad$) {
-        this.loadMeshes(indicies, { name: id })
-      }
-    })
-
-    const obj = Array.from(this.multiNgIdsLabelIndexMap.keys()).map(ngId => {
-      return [
-        ngId,
-        new Map(Array.from(
-          [
-            // set aux mesh first
-            // as sometimes, existing rgb can overwrite the rgb prop of aux mesh
-            ...this.auxilaryMeshIndices.map(val => {
-              return [val, {}]
-            }),
-            ...this.multiNgIdsLabelIndexMap.get(ngId).entries(),
-          ],
-        ).map((val: [number, any]) => ([val[0], this.getRgb(val[0], { ngId, rgb: val[1].rgb})])) as any),
-      ]
-    }) as Array<[string, Map<number, {red: number, green: number, blue: number}>]>
-
-    const multiNgIdColorMap = new Map(obj)
-
-    /* load colour maps */
-
-    this.setColorMap(multiNgIdColorMap)
-
     this._s$.forEach(_s$ => {
       if (_s$) { _s$.unsubscribe() }
     })
 
-    if (this._s1$) {this._s1$.unsubscribe() }
-    if (this._s9$) {this._s9$.unsubscribe() }
-
-    const arr = Array.from(this.multiNgIdsLabelIndexMap.keys()).map(ngId => {
-      return this.nehubaViewer.getShownSegmentsObservable({
-        name: ngId,
-      }).subscribe(arrayIdx => this.updateColorMap(arrayIdx, ngId))
-    })
-
-    this._s9$ = {
-      unsubscribe: () => {
-        while (arr.length > 0) {
-          arr.pop().unsubscribe()
-        }
-      },
-    }
   }
 
-  public setColorMap(map: Map<string, Map<number, {red: number, green: number, blue: number}>>) {
+  private setColorMap(map: Map<string, Map<number, {red: number, green: number, blue: number}>>) {
     this.multiNgIdColorMap = map
-
-    Array.from(map.entries()).forEach(([ngId, map]) => {
-
+    for (const [ ngId, cMap ] of map.entries()) {
+      const nMap = new Map()
+      for (const [ key, cm ] of cMap.entries()) {
+        nMap.set(Number(key), cm)
+      }
       this.nehubaViewer.batchAddAndUpdateSegmentColors(
-        map,
+        nMap,
         { name : ngId })
-    })
-  }
-
-  private getRgb(labelIndex: number, region: { rgb: number[], ngId: string }): {red: number, green: number, blue: number} {
-    const { rgb, ngId } = region
-    if (typeof rgb === 'undefined' || rgb === null) {
-      if (labelIndex > 65500) {
-        return {
-          red: 255,
-          green: 255,
-          blue: 255
-        }
-      }
-      const arr = strToRgb(`${ngId}${labelIndex}`)
-      return {
-        red : arr[0],
-        green: arr[1],
-        blue : arr[2],
-      }
-    }
-    return {
-      red : rgb[0],
-      green: rgb[1],
-      blue : rgb[2],
     }
   }
 }
diff --git a/src/viewerModule/nehuba/nehubaViewerGlue/nehubaViewerGlue.component.ts b/src/viewerModule/nehuba/nehubaViewerGlue/nehubaViewerGlue.component.ts
index af1bbefe8592dc18f515a9606a74461e7264404b..004f45f50516bcc6dc5ea1d55a575ac750be0781 100644
--- a/src/viewerModule/nehuba/nehubaViewerGlue/nehubaViewerGlue.component.ts
+++ b/src/viewerModule/nehuba/nehubaViewerGlue/nehubaViewerGlue.component.ts
@@ -1,26 +1,28 @@
 import { Component, ElementRef, EventEmitter, Inject, Input, OnChanges, OnDestroy, Optional, Output, SimpleChanges, ViewChild } from "@angular/core";
 import { select, Store } from "@ngrx/store";
-import { asyncScheduler, combineLatest, fromEvent, interval, merge, Observable, of, Subject, timer } from "rxjs";
-import { ngViewerActionAddNgLayer, ngViewerActionRemoveNgLayer, ngViewerActionSetPerspOctantRemoval, ngViewerActionToggleMax } from "src/services/state/ngViewerState/actions";
+import { asyncScheduler, combineLatest, fromEvent, merge, Observable, of, Subject } from "rxjs";
+import { ngViewerActionAddNgLayer, ngViewerActionRemoveNgLayer, ngViewerActionToggleMax } from "src/services/state/ngViewerState/actions";
 import { ClickInterceptor, CLICK_INTERCEPTOR_INJECTOR } from "src/util";
 import { uiStateMouseOverSegmentsSelector } from "src/services/state/uiState/selectors";
-import { debounceTime, distinctUntilChanged, filter, map, mapTo, scan, shareReplay, startWith, switchMap, switchMapTo, take, tap, throttleTime, withLatestFrom } from "rxjs/operators";
+import { debounceTime, distinctUntilChanged, filter, map, mapTo, scan, shareReplay, startWith, switchMap, switchMapTo, take, tap, throttleTime } from "rxjs/operators";
 import { viewerStateAddUserLandmarks, viewerStateChangeNavigation, viewerStateMouseOverCustomLandmark, viewerStateSelectRegionWithIdDeprecated, viewerStateSetSelectedRegions, viewreStateRemoveUserLandmarks } from "src/services/state/viewerState/actions";
-import { ngViewerSelectorLayers, ngViewerSelectorClearView, ngViewerSelectorPanelOrder, ngViewerSelectorOctantRemoval, ngViewerSelectorPanelMode } from "src/services/state/ngViewerState/selectors";
+import { ngViewerSelectorLayers, ngViewerSelectorClearView, ngViewerSelectorPanelOrder, ngViewerSelectorPanelMode } from "src/services/state/ngViewerState/selectors";
 import { viewerStateCustomLandmarkSelector, viewerStateNavigationStateSelector, viewerStateSelectedRegionsSelector } from "src/services/state/viewerState/selectors";
 import { serialiseParcellationRegion } from 'common/util'
 import { ARIA_LABELS, IDS } from 'common/constants'
 import { PANELS } from "src/services/state/ngViewerState/constants";
 import { LoggingService } from "src/logging";
 
-import { getNgIds, getMultiNgIdsRegionsLabelIndexMap, SET_MESHES_TO_LOAD } from "../constants";
+import { getMultiNgIdsRegionsLabelIndexMap, SET_MESHES_TO_LOAD } from "../constants";
 import { IViewer, TViewerEvent } from "../../viewer.interface";
 import { NehubaViewerUnit } from "../nehubaViewer/nehubaViewer.component";
 import { NehubaViewerContainerDirective } from "../nehubaViewerInterface/nehubaViewerInterface.directive";
-import { cvtNavigationObjToNehubaConfig, getFourPanel, getHorizontalOneThree, getSinglePanel, getVerticalOneThree, NEHUBA_INSTANCE_INJTKN, scanSliceViewRenderFn, takeOnePipe } from "../util";
+import { cvtNavigationObjToNehubaConfig, getFourPanel, getHorizontalOneThree, getSinglePanel, getVerticalOneThree, scanSliceViewRenderFn, takeOnePipe } from "../util";
 import { API_SERVICE_SET_VIEWER_HANDLE_TOKEN, TSetViewerHandle } from "src/atlasViewer/atlasViewer.apiService.service";
 import { MouseHoverDirective } from "src/mouseoverModule";
 import { NehubaMeshService } from "../mesh.service";
+import { NehubaLayerControlService, IColorMap, SET_COLORMAP_OBS, SET_LAYER_VISIBILITY } from "../layerCtrl.service";
+import { switchMapWaitFor } from "src/util/fn";
 
 interface INgLayerInterface {
   name: string // displayName
@@ -46,7 +48,18 @@ interface INgLayerInterface {
       useFactory: (meshService: NehubaMeshService) => meshService.loadMeshes$,
       deps: [ NehubaMeshService ]
     },
-    NehubaMeshService
+    NehubaMeshService,
+    {
+      provide: SET_COLORMAP_OBS,
+      useFactory: (layerCtrl: NehubaLayerControlService) => layerCtrl.setColorMap$,
+      deps: [ NehubaLayerControlService ]
+    },
+    {
+      provide: SET_LAYER_VISIBILITY,
+      useFactory: (layerCtrl: NehubaLayerControlService) => layerCtrl.visibleLayer$,
+      deps: [ NehubaLayerControlService ]
+    },
+    NehubaLayerControlService
   ]
 })
 
@@ -101,31 +114,6 @@ export class NehubaGlueCmp implements IViewer, OnChanges, OnDestroy{
     }))),
   )
 
-  private forceUI$ = this.customLandmarks$.pipe(
-    map(lm => {
-      if (lm.length > 0) {
-        return {
-          target: 'perspective:octantRemoval',
-          mode: false,
-          message: `octant control disabled: showing landmarks.`
-        }
-      } else {
-        return {
-          target: 'perspective:octantRemoval',
-          mode: null
-        }
-      }
-    })
-  )
-
-  public disableOctantRemovalCtrl$ = this.forceUI$.pipe(
-    filter(({ target }) => target === 'perspective:octantRemoval'),
-  )
-
-  public nehubaViewerPerspectiveOctantRemoval$ = this.store$.pipe(
-    select(ngViewerSelectorOctantRemoval),
-  )
-
   public panelOrder$ = this.store$.pipe(
     select(ngViewerSelectorPanelOrder),
     distinctUntilChanged(),
@@ -164,21 +152,11 @@ export class NehubaGlueCmp implements IViewer, OnChanges, OnDestroy{
       return
     }
 
-    /**
-     * first, get all all the ngIds, including parent id from parcellation (if defined)
-     */
-    const ngIds = getNgIds(parcellation.regions).concat( parcellation.ngId ? parcellation.ngId : [])
-
     this.multiNgIdsRegionsLabelIndexMap = getMultiNgIdsRegionsLabelIndexMap(parcellation)
 
     this.viewerUnit.multiNgIdsLabelIndexMap = this.multiNgIdsRegionsLabelIndexMap
     this.viewerUnit.auxilaryMeshIndices = parcellation.auxillaryMeshIndices || []
 
-    /* TODO replace with proper KG id */
-    /**
-     * need to set unique array of ngIds, or else workers will be overworked
-     */
-    this.viewerUnit.ngIds = Array.from(new Set(ngIds))
   }
 
   private unloadTmpl(tmpl: any) {
@@ -282,6 +260,7 @@ export class NehubaGlueCmp implements IViewer, OnChanges, OnDestroy{
     private log: LoggingService,
     @Optional() @Inject(CLICK_INTERCEPTOR_INJECTOR) clickInterceptor: ClickInterceptor,
     @Optional() @Inject(API_SERVICE_SET_VIEWER_HANDLE_TOKEN) setViewerHandle: TSetViewerHandle,
+    @Optional() private layerCtrlService: NehubaLayerControlService,
   ){
     this.viewerEvent.emit({
       type: 'MOUSEOVER_ANNOTATION',
@@ -473,19 +452,6 @@ export class NehubaGlueCmp implements IViewer, OnChanges, OnDestroy{
     })
     this.onDestroyCb.push(() => perspectiveRenderEvSub.unsubscribe())
 
-    const perspOctCtrlSub = this.customLandmarks$.pipe(
-      withLatestFrom(
-        this.nehubaViewerPerspectiveOctantRemoval$
-      ),
-      switchMap(this.waitForNehuba.bind(this))
-    ).subscribe(([ landmarks, flag ]) => {
-      this.nehubaContainerDirective.toggleOctantRemoval(
-        landmarks.length > 0 ? false : flag
-      )
-      this.nehubaContainerDirective.nehubaViewerInstance.updateUserLandmarks(landmarks)
-    })
-    this.onDestroyCb.push(() => perspOctCtrlSub.unsubscribe())
-
     this.sliceRenderEvent$ = fromEvent<CustomEvent>(this.el.nativeElement, 'sliceRenderEvent')
     this.sliceViewLoadingMain$ = this.sliceRenderEvent$.pipe(
       scan(scanSliceViewRenderFn, [null, null, null]),
@@ -648,25 +614,37 @@ export class NehubaGlueCmp implements IViewer, OnChanges, OnDestroy{
             selectRegionIds: []
           }))
         },
-        segmentColourMap : new Map(),
         getLayersSegmentColourMap: () => {
+          if (!this.layerCtrlService) {
+            throw new Error(`layerCtrlService not injected. Cannot call getLayersSegmentColourMap`)
+          }
           const newMainMap = new Map()
-          for (const [key, colormap] of this.nehubaContainerDirective.nehubaViewerInstance.multiNgIdColorMap.entries()) {
-            const newColormap = new Map()
-            newMainMap.set(key, newColormap)
-  
-            for (const [lableIndex, entry] of colormap.entries()) {
-              newColormap.set(lableIndex, JSON.parse(JSON.stringify(entry)))
+          for (const key in this.layerCtrlService.activeColorMap) {
+            const obj = this.layerCtrlService.activeColorMap[key]
+            const m = new Map()
+            newMainMap.set(key, m)
+            for (const labelIndex in obj) {
+              m.set(Number(labelIndex), obj[labelIndex])
             }
           }
           return newMainMap
         },
-        applyColourMap : (_map) => {
-          throw new Error(`apply color map has been deprecated. use applyLayersColourMap instead`)
-        },
         applyLayersColourMap: (map) => {
-          this.nehubaContainerDirective.nehubaViewerInstance.setColorMap(map)
+          if (!this.layerCtrlService) {
+            throw new Error(`layerCtrlService not injected. Cannot call getLayersSegmentColourMap`)
+          }
+          const obj: IColorMap = {}
+          for (const [ key, value ] of map.entries()) {
+            const cmap = obj[key] = {}
+            for (const [ labelIdx, rgb ] of value.entries()) {
+              cmap[Number(labelIdx)] = rgb
+            }
+          }
+          this.layerCtrlService.overwriteColorMap$.next(obj)
         },
+        /**
+         * TODO go via layerCtrl.service
+         */
         loadLayer : (layerObj) => this.nehubaContainerDirective.nehubaViewerInstance.loadLayer(layerObj),
         removeLayer : (condition) => this.nehubaContainerDirective.nehubaViewerInstance.removeLayer(condition),
         setLayerVisibility : (condition, visible) => this.nehubaContainerDirective.nehubaViewerInstance.setLayerVisibility(condition, visible),
@@ -680,9 +658,14 @@ export class NehubaGlueCmp implements IViewer, OnChanges, OnDestroy{
           /**
            * neuroglancer prevents propagation, so use capture instead
            */
-          Observable.create(observer => {
-            this.el.nativeElement.addEventListener('mousedown', event => observer.next({eventName: 'mousedown', event}), true)
-          }) as Observable<{eventName: string, event: MouseEvent}>,
+          fromEvent(this.el.nativeElement, 'mousedown', { capture: true }).pipe(
+            map((event: MouseEvent) => {
+              return {
+                eventName: 'mousedown',
+                event
+              }
+            })
+          ),
           fromEvent(this.el.nativeElement, 'mouseup').pipe(
             map((ev: MouseEvent) => ({eventName : 'mouseup', event: ev})),
           ),
@@ -717,7 +700,7 @@ export class NehubaGlueCmp implements IViewer, OnChanges, OnDestroy{
     this.viewerLoaded = flag
   }
 
-  private selectHoveredRegion(ev: any, next: Function){
+  private selectHoveredRegion(_ev: any, next: Function){
     /**
      * If label indicies are not defined by the ontology, it will be a string in the format of `{ngId}#{labelIndex}`
      */
@@ -731,21 +714,9 @@ export class NehubaGlueCmp implements IViewer, OnChanges, OnDestroy{
     next()
   }
 
-  private waitForNehuba(arg: unknown) {
-    return interval(16).pipe(
-      filter(() => !!(this.nehubaContainerDirective?.isReady())),
-      take(1),
-      mapTo(arg),
-    )
-  }
-
-  public setOctantRemoval(octantRemovalFlag: boolean) {
-    this.store$.dispatch(
-      ngViewerActionSetPerspOctantRemoval({
-        octantRemovalFlag
-      })
-    )
-  }
+  private waitForNehuba = switchMapWaitFor({
+    condition: () => !!(this.nehubaContainerDirective?.isReady())
+  }) 
 
   public toggleMaximiseMinimise(index: number) {
     this.store$.dispatch(ngViewerActionToggleMax({
diff --git a/src/viewerModule/nehuba/nehubaViewerGlue/nehubaViewerGlue.template.html b/src/viewerModule/nehuba/nehubaViewerGlue/nehubaViewerGlue.template.html
index 65057b2b5f6b841514f2619dc063b96fe136afe7..d5f86d163f05dcb062d6883476a76670d9e132f0 100644
--- a/src/viewerModule/nehuba/nehubaViewerGlue/nehubaViewerGlue.template.html
+++ b/src/viewerModule/nehuba/nehubaViewerGlue/nehubaViewerGlue.template.html
@@ -115,12 +115,12 @@
 
     <!-- perspective specific control -->
     <ng-container *ngIf="panelIndex === 3">
-      <ng-container *ngTemplateOutlet="perspectiveOctantRemovalTmpl; context: {
-        state: (nehubaViewerPerspectiveOctantRemoval$ | async),
-        disableOctantRemovalCtrl: disableOctantRemovalCtrl$ | async
-      }">
 
-      </ng-container>
+      <button mat-icon-button color="primary"
+        [matMenuTriggerFor]="viewerCtrlMenu">
+        <i class="fas fa-cog"></i>
+      </button>
+
     </ng-container>
 
     <!-- factor < 1.0 === zoom in -->
@@ -145,28 +145,12 @@
 
 </ng-template>
 
-<!-- tmpl for toggling perspective frontal octant -->
-<ng-template #perspectiveOctantRemovalTmpl
-  let-state="state"
-  let-disableOctantRemovalCtrl="disableOctantRemovalCtrl">
-  <div class="d-inline-block"
-    [matTooltip]="disableOctantRemovalCtrl?.mode !== null ? disableOctantRemovalCtrl.message : null">
-    <button
-      (click)="setOctantRemoval(!state)"
-      mat-icon-button
-      [disabled]="disableOctantRemovalCtrl?.mode !== null"
-      [attr.aria-label]="ARIA_LABELS.TOGGLE_FRONTAL_OCTANT"
-      color="primary">
-
-      <!-- octant removal is true -->
-      <ng-template [ngIf]="disableOctantRemovalCtrl?.mode !== null ? disableOctantRemovalCtrl.mode : state" [ngIfElse]="octantRemovalOffTmpl">
-        <i class="fas fa-eye-slash"></i>
-      </ng-template>
-
-      <!-- octant removal is false -->
-      <ng-template #octantRemovalOffTmpl>
-        <i class="fas fa-eye"></i>
-      </ng-template>
-    </button>
-  </div>
-</ng-template>
\ No newline at end of file
+<!-- viewer ctrl -->
+<mat-menu #viewerCtrlMenu>
+  <!-- NB must not lazy load. key listener needs to work even when component is not yet rendered -->
+  <!-- stop propagation is needed, or else click will result in dismiss of menu -->
+  <viewer-ctrl-component class="d-block m-2 ml-3 mr-3"
+    #viewerCtrlCmp="viewerCtrlCmp"
+    (click)="$event.stopPropagation()">
+  </viewer-ctrl-component>
+</mat-menu>
diff --git a/src/viewerModule/nehuba/nehubaViewerInterface/nehubaViewerInterface.directive.spec.ts b/src/viewerModule/nehuba/nehubaViewerInterface/nehubaViewerInterface.directive.spec.ts
index a061c392141ee2c259157fc7df55dc75feb7d287..42c350441b7aba57d1a3d15eece54a238e25b2a7 100644
--- a/src/viewerModule/nehuba/nehubaViewerInterface/nehubaViewerInterface.directive.spec.ts
+++ b/src/viewerModule/nehuba/nehubaViewerInterface/nehubaViewerInterface.directive.spec.ts
@@ -88,7 +88,8 @@ describe('> nehubaViewerInterface.directive.ts', () => {
         mouseoverUserlandmarkEmitter: new Subject(),
         elementRef: {
           nativeElement: {}
-        }
+        },
+        toggleOctantRemoval: jasmine.createSpy()
       }
       const spyComRef = {
         destroy: jasmine.createSpy('destroy')
diff --git a/src/viewerModule/nehuba/nehubaViewerInterface/nehubaViewerInterface.directive.ts b/src/viewerModule/nehuba/nehubaViewerInterface/nehubaViewerInterface.directive.ts
index cdb000a9cfa40f0c34ba86f7dc6e697a7ea6267a..33891485ba4928a4a4f5a8f0e817fda7acd67dcd 100644
--- a/src/viewerModule/nehuba/nehubaViewerInterface/nehubaViewerInterface.directive.ts
+++ b/src/viewerModule/nehuba/nehubaViewerInterface/nehubaViewerInterface.directive.ts
@@ -290,11 +290,11 @@ export class NehubaViewerContainerDirective implements OnInit, OnDestroy{
   }
 
   public toggleOctantRemoval(flag: boolean){
-    const showPerspectiveSliceViews = this.nehubaViewerInstance?.nehubaViewer?.ngviewer?.showPerspectiveSliceViews
-    if (showPerspectiveSliceViews) showPerspectiveSliceViews.restoreState(flag)
-    else {
-      this.log && this.log.warn(`showPerspectiveSliceViews not defined`)
+    if (!this.nehubaViewerInstance) {
+      this.log.error(`this.nehubaViewerInstance is not yet available`)
+      return
     }
+    this.nehubaViewerInstance.toggleOctantRemoval(flag)
   }
 
   createNehubaInstance(template: any, lifeCycle: INehubaLifecycleHook = {}){
@@ -309,7 +309,7 @@ export class NehubaViewerContainerDirective implements OnInit, OnDestroy{
       }
     }
 
-    const { nehubaConfig } = template
+    const { nehubaConfig, name } = template
 
     /**
      * apply viewer config such as gpu limit
diff --git a/src/viewerModule/nehuba/store.ts b/src/viewerModule/nehuba/store.ts
deleted file mode 100644
index f00a217031ac76ef8bb50ba0a7e30b0e47963e22..0000000000000000000000000000000000000000
--- a/src/viewerModule/nehuba/store.ts
+++ /dev/null
@@ -1,36 +0,0 @@
-import { createReducer } from "@ngrx/store";
-import { INgLayerInterface } from "src/services/state/ngViewerState.store";
-
-
-/**
- * TODO port from global store to feature store
- */
-
-enum EnumPanelMode {
-  FOUR_PANEL = 'FOUR_PANEL',
-  V_ONE_THREE = 'V_ONE_THREE',
-  H_ONE_THREE = 'H_ONE_THREE',
-  SINGLE_PANEL = 'SINGLE_PANEL',
-}
-
-interface INehubaFeature {
-  layers: INgLayerInterface[]
-  panelMode: string
-  panelOrder: string
-  octantRemoval: boolean
-  clearViewQueue: {
-    [key: string]: boolean
-  }
-}
-
-const defaultState: INehubaFeature = {
-  layers: [],
-  panelMode: EnumPanelMode.FOUR_PANEL,
-  panelOrder: '0123',
-  octantRemoval: true,
-  clearViewQueue: {}
-}
-
-export const reducer = createReducer(
-  defaultState
-)
\ No newline at end of file
diff --git a/src/viewerModule/nehuba/store/actions.ts b/src/viewerModule/nehuba/store/actions.ts
new file mode 100644
index 0000000000000000000000000000000000000000..38c6572e1259651318bede3684278e71179f3daa
--- /dev/null
+++ b/src/viewerModule/nehuba/store/actions.ts
@@ -0,0 +1,36 @@
+import { createAction, props } from "@ngrx/store";
+import { INgLayerInterface } from "src/services/state/ngViewerState.store";
+import { NEHUBA_VIEWER_FEATURE_KEY } from "../constants";
+import { IAuxMesh } from "./type";
+
+export const actionAddNgLayer = createAction(
+  `[${NEHUBA_VIEWER_FEATURE_KEY}] [addNgLayer]`,
+  props<{
+    layers: INgLayerInterface[]
+  }>()
+)
+
+export const actionSetAuxMesh = createAction(
+  `[${NEHUBA_VIEWER_FEATURE_KEY}] [setAuxMesh]`,
+  props<{
+    payload: IAuxMesh
+  }>()
+)
+
+export const actionRemoveAuxMesh = createAction(
+  `[${NEHUBA_VIEWER_FEATURE_KEY}] [rmAuxMesh]`,
+  props<{
+    payload: { "@id": string }
+  }>()
+)
+
+export const actionSetAuxMeshes = createAction(
+  `[${NEHUBA_VIEWER_FEATURE_KEY}] [setAuxMeshes]`,
+  props<{
+    payload: IAuxMesh[]
+  }>()
+)
+
+export const actionClearAuxMeshes = createAction(
+  `[${NEHUBA_VIEWER_FEATURE_KEY}] [clearAuxMeshes]`
+)
diff --git a/src/viewerModule/nehuba/store/index.ts b/src/viewerModule/nehuba/store/index.ts
new file mode 100644
index 0000000000000000000000000000000000000000..a384638d8bf82bd1b38296d9a061405b552cd7f1
--- /dev/null
+++ b/src/viewerModule/nehuba/store/index.ts
@@ -0,0 +1,18 @@
+export {
+  actionAddNgLayer,
+  actionRemoveAuxMesh,
+  actionSetAuxMesh,
+  actionClearAuxMeshes,
+  actionSetAuxMeshes,
+} from './actions'
+export {
+  selectorAuxMeshes
+} from './selectors'
+export {
+  reducer
+} from './store'
+export {
+  IAuxMesh,
+  INehubaFeature,
+  INgLayerInterface
+} from './type'
diff --git a/src/viewerModule/nehuba/store/selectors.ts b/src/viewerModule/nehuba/store/selectors.ts
new file mode 100644
index 0000000000000000000000000000000000000000..528d54d7d49dc53dde74f5c59b280efb87b4db0b
--- /dev/null
+++ b/src/viewerModule/nehuba/store/selectors.ts
@@ -0,0 +1,8 @@
+import { createSelector } from "@ngrx/store";
+import { NEHUBA_VIEWER_FEATURE_KEY } from '../constants'
+import { INehubaFeature, IAuxMesh } from "./type";
+
+export const selectorAuxMeshes = createSelector<any, INehubaFeature, IAuxMesh[]>(
+  state => state[NEHUBA_VIEWER_FEATURE_KEY],
+  nehubaFeatureStore => nehubaFeatureStore['auxMeshes']
+)
diff --git a/src/viewerModule/nehuba/store/store.ts b/src/viewerModule/nehuba/store/store.ts
new file mode 100644
index 0000000000000000000000000000000000000000..6782fa77c723fe8457f268df1d74f63535556b58
--- /dev/null
+++ b/src/viewerModule/nehuba/store/store.ts
@@ -0,0 +1,54 @@
+import { createReducer, on } from "@ngrx/store";
+import { actionRemoveAuxMesh, actionSetAuxMesh, actionSetAuxMeshes } from "./actions";
+import { INehubaFeature } from "./type";
+
+
+/**
+ * TODO port from global store to feature store
+ */
+
+enum EnumPanelMode {
+  FOUR_PANEL = 'FOUR_PANEL',
+  V_ONE_THREE = 'V_ONE_THREE',
+  H_ONE_THREE = 'H_ONE_THREE',
+  SINGLE_PANEL = 'SINGLE_PANEL',
+}
+
+const defaultState: INehubaFeature = {
+  layers: [],
+  panelMode: EnumPanelMode.FOUR_PANEL,
+  panelOrder: '0123',
+  octantRemoval: true,
+  clearViewQueue: {},
+  auxMeshes: []
+}
+
+export const reducer = createReducer(
+  defaultState,
+  on(actionSetAuxMeshes, (state, { payload }) => {
+    return {
+      ...state,
+      auxMeshes: payload
+    }
+  }),
+  on(actionSetAuxMesh, (state, { payload }) => {
+    return {
+      ...state,
+      auxMeshes: state.auxMeshes.map(v => v['@id'] === payload['@id']
+        ? payload
+        : v)
+    }
+  }),
+  on(actionRemoveAuxMesh, (state, {payload}) => {
+    return {
+      ...state,
+      auxMeshes: state.auxMeshes.filter(v => v['@id'] !== payload['@id'])
+    }
+  }),
+  on(actionRemoveAuxMesh, state => {
+    return {
+      ...state,
+      auxMeshes: []
+    }
+  })
+)
diff --git a/src/viewerModule/nehuba/store/type.ts b/src/viewerModule/nehuba/store/type.ts
new file mode 100644
index 0000000000000000000000000000000000000000..4b1d4d3d69ab657aa67edbd18512397cda07d495
--- /dev/null
+++ b/src/viewerModule/nehuba/store/type.ts
@@ -0,0 +1,31 @@
+export interface IAuxMesh {
+  ['@id']: string
+  name: string
+  displayName?: string
+  ngId: string
+  labelIndicies: number[]
+  rgb: [number, number, number]
+  visible: boolean
+}
+
+export interface INgLayerInterface {
+  name: string // displayName
+  source: string
+  mixability: string // base | mixable | nonmixable
+  annotation?: string //
+  id?: string // unique identifier
+  visible?: boolean
+  shader?: string
+  transform?: any
+}
+
+export interface INehubaFeature {
+  layers: INgLayerInterface[]
+  panelMode: string
+  panelOrder: string
+  octantRemoval: boolean
+  clearViewQueue: {
+    [key: string]: boolean
+  }
+  auxMeshes: IAuxMesh[]
+}
diff --git a/src/viewerModule/nehuba/viewerCtrl/index.ts b/src/viewerModule/nehuba/viewerCtrl/index.ts
new file mode 100644
index 0000000000000000000000000000000000000000..6f3447caf89d780f37adf4a2ff01403e9468440a
--- /dev/null
+++ b/src/viewerModule/nehuba/viewerCtrl/index.ts
@@ -0,0 +1 @@
+export { ViewerCtrlModule } from './module'
diff --git a/src/viewerModule/nehuba/viewerCtrl/module.ts b/src/viewerModule/nehuba/viewerCtrl/module.ts
new file mode 100644
index 0000000000000000000000000000000000000000..e3f1623f13f128fbc5df4ba9bd88606048bda0ae
--- /dev/null
+++ b/src/viewerModule/nehuba/viewerCtrl/module.ts
@@ -0,0 +1,26 @@
+import { CommonModule } from "@angular/common";
+import { NgModule } from "@angular/core";
+import { FormsModule, ReactiveFormsModule } from "@angular/forms";
+import { ComponentsModule } from "src/components";
+import { AngularMaterialModule } from "src/ui/sharedModules/angularMaterial.module";
+import { UtilModule } from "src/util";
+import { ViewerCtrlCmp } from "./viewerCtrlCmp/viewerCtrlCmp.component";
+
+@NgModule({
+  imports: [
+    CommonModule,
+    AngularMaterialModule,
+    UtilModule,
+    FormsModule,
+    ReactiveFormsModule,
+    ComponentsModule,
+  ],
+  declarations: [
+    ViewerCtrlCmp,
+  ],
+  exports: [
+    ViewerCtrlCmp
+  ]
+})
+
+export class ViewerCtrlModule{}
diff --git a/src/viewerModule/nehuba/viewerCtrl/viewerCtrlCmp/viewerCtrlCmp.component.spec.ts b/src/viewerModule/nehuba/viewerCtrl/viewerCtrlCmp/viewerCtrlCmp.component.spec.ts
new file mode 100644
index 0000000000000000000000000000000000000000..3a3e81dc4cb133762ca00310d7e839904776fcd8
--- /dev/null
+++ b/src/viewerModule/nehuba/viewerCtrl/viewerCtrlCmp/viewerCtrlCmp.component.spec.ts
@@ -0,0 +1,211 @@
+import { CommonModule } from "@angular/common"
+import { ComponentFixture, TestBed } from "@angular/core/testing"
+import { FormsModule, ReactiveFormsModule } from "@angular/forms"
+import { MockStore, provideMockStore } from "@ngrx/store/testing"
+import { BehaviorSubject, of } from "rxjs"
+import { ComponentsModule } from "src/components"
+import { ngViewerSelectorOctantRemoval } from "src/services/state/ngViewerState.store.helper"
+import { viewerStateCustomLandmarkSelector, viewerStateSelectedTemplatePureSelector } from "src/services/state/viewerState/selectors"
+import { AngularMaterialModule } from "src/ui/sharedModules/angularMaterial.module"
+import { UtilModule } from "src/util"
+import { actionSetAuxMeshes, selectorAuxMeshes } from "../../store"
+import { NEHUBA_INSTANCE_INJTKN } from "../../util"
+import { ViewerCtrlCmp } from "./viewerCtrlCmp.component"
+import { TestbedHarnessEnvironment } from '@angular/cdk/testing/testbed'
+import { HarnessLoader } from "@angular/cdk/testing"
+import { MatSlideToggleHarness } from '@angular/material/slide-toggle/testing'
+
+describe('> viewerCtrlCmp.component.ts', () => {
+  describe('> ViewerCtrlCmp', () => {
+    let fixture: ComponentFixture<ViewerCtrlCmp>
+    let loader: HarnessLoader
+    let mockStore: MockStore
+    let mockNehubaViewer = {
+      updateUserLandmarks: jasmine.createSpy()
+    }
+
+    afterEach(() => {
+      mockNehubaViewer.updateUserLandmarks.calls.reset()
+    })
+
+    beforeEach( async () => {
+      await TestBed.configureTestingModule({
+        imports: [
+          CommonModule,
+          AngularMaterialModule,
+          FormsModule,
+          ReactiveFormsModule,
+          ComponentsModule,
+          UtilModule,
+        ],
+        declarations: [ ViewerCtrlCmp ],
+        providers: [
+          provideMockStore(),
+          {
+            provide: NEHUBA_INSTANCE_INJTKN,
+            useValue: new BehaviorSubject(mockNehubaViewer)
+          }
+        ]
+      }).compileComponents()
+
+    })
+    beforeEach(() => {
+      mockStore = TestBed.inject(MockStore)
+      mockStore.overrideSelector(viewerStateSelectedTemplatePureSelector, {})
+      mockStore.overrideSelector(ngViewerSelectorOctantRemoval, true)
+      mockStore.overrideSelector(viewerStateCustomLandmarkSelector, [])
+    })
+
+    describe('> can be init', () => {
+
+      beforeEach(() => {
+        mockStore.overrideSelector(selectorAuxMeshes, [])
+        fixture = TestBed.createComponent(ViewerCtrlCmp)
+        fixture.detectChanges()
+        loader = TestbedHarnessEnvironment.loader(fixture)
+      })
+  
+      it('> can be inst', () => {
+        expect(fixture).toBeTruthy()
+      })
+    })
+
+    describe('> UI', () => {
+
+      beforeEach(() => {
+        mockStore.overrideSelector(selectorAuxMeshes, [])
+        fixture = TestBed.createComponent(ViewerCtrlCmp)
+        fixture.detectChanges()
+        loader = TestbedHarnessEnvironment.loader(fixture)
+      })
+
+      describe('> octant removal', () => {
+        const toggleName = 'remove-frontal-octant'
+        let setOctantRemovalSpy: jasmine.Spy
+        beforeEach(() => {
+          setOctantRemovalSpy = spyOn(fixture.componentInstance, 'setOctantRemoval')
+        })
+        afterEach(() => {
+          setOctantRemovalSpy.calls.reset()
+        })
+  
+        it('> toggleslider should exist', async () => {
+          const slideToggle = await loader.getAllHarnesses(
+            MatSlideToggleHarness.with({
+              name: toggleName,
+            })
+          )
+          expect(slideToggle.length).toBe(1)
+        })
+  
+        it('> toggling it should result in setOctantRemoval to be called', async () => {
+          const slideToggle = await loader.getAllHarnesses(
+            MatSlideToggleHarness.with({
+              name: toggleName,
+            })
+          )
+          const wasChecked = await slideToggle[0].isChecked()
+          await slideToggle[0].toggle()
+          expect(
+            setOctantRemovalSpy
+          ).toHaveBeenCalledWith(!wasChecked)
+        })
+      })
+  
+      describe('> toggle delineation', () => {
+        
+        let toggleDelination: jasmine.Spy
+        const toggleName = 'toggle-delineation'
+        beforeEach(() => {
+          toggleDelination = spyOn<any>(fixture.componentInstance, 'toggleParcVsbl')
+        })
+        afterEach(() => {
+          toggleDelination.calls.reset()
+        })
+  
+        it('> toggleslider should exist', async () => {
+          const slideToggle = await loader.getAllHarnesses(
+            MatSlideToggleHarness.with({
+              name: toggleName,
+            })
+          )
+          expect(slideToggle.length).toBe(1)
+        })
+  
+        it('> toggling it should result in setOctantRemoval to be called', async () => {
+          const slideToggle = await loader.getAllHarnesses(
+            MatSlideToggleHarness.with({
+              name: toggleName,
+            })
+          )
+          await slideToggle[0].toggle()
+          expect(
+            toggleDelination
+          ).toHaveBeenCalled()
+        })
+      })
+    })
+
+    describe('> UI aux meshes', () => {
+      const id = 'test-1-id'
+      const name = `toggle-aux-mesh-${id}`
+      const auxMesh = {
+        '@id': id,
+        labelIndicies: [1,2,3],
+        name: 'test-1-name',
+        ngId: 'test-1-ng-id',
+        rgb: [255, 255, 255] as [number, number, number] , 
+        visible: true,
+      }
+      const auxMesh2 = {
+        '@id': 'foo-bar',
+        labelIndicies: [3,4,5],
+        name: 'test-2-name',
+        ngId: 'test-2-ng-id',
+        rgb: [100, 100, 100] as [number, number, number] , 
+        visible: true,
+      }
+      beforeEach(() => {
+        mockStore.overrideSelector(selectorAuxMeshes, [
+          auxMesh,
+          auxMesh2
+        ])
+        fixture = TestBed.createComponent(ViewerCtrlCmp)
+        fixture.detectChanges()
+        loader = TestbedHarnessEnvironment.loader(fixture)
+      })
+      it('> toggleslider should exist', async () => {
+        const slideToggle = await loader.getAllHarnesses(
+          MatSlideToggleHarness.with({
+            name
+          })
+        )
+        expect(slideToggle.length).toBe(1)
+      })
+
+      it('> toggling it should call dispatch', async () => {
+        const dispatchSpy = spyOn(mockStore, 'dispatch')
+
+        const slideToggle = await loader.getAllHarnesses(
+          MatSlideToggleHarness.with({
+            name
+          })
+        )
+        await slideToggle[0].toggle()
+        expect(
+          dispatchSpy
+        ).toHaveBeenCalledWith(
+          actionSetAuxMeshes({
+            payload: [
+              {
+                ...auxMesh,
+                visible: !auxMesh.visible
+              },
+              auxMesh2
+            ]
+          })
+        )
+      })
+    })
+  })
+})
diff --git a/src/viewerModule/nehuba/viewerCtrl/viewerCtrlCmp/viewerCtrlCmp.component.ts b/src/viewerModule/nehuba/viewerCtrl/viewerCtrlCmp/viewerCtrlCmp.component.ts
new file mode 100644
index 0000000000000000000000000000000000000000..cbe0380a6c5a06350b7ec29287072094343a25c2
--- /dev/null
+++ b/src/viewerModule/nehuba/viewerCtrl/viewerCtrlCmp/viewerCtrlCmp.component.ts
@@ -0,0 +1,192 @@
+import { Component, HostBinding, Inject, Optional } from "@angular/core";
+import { select, Store } from "@ngrx/store";
+import { combineLatest, merge, Observable, of, Subscription } from "rxjs";
+import { filter, map, pairwise, withLatestFrom } from "rxjs/operators";
+import { ngViewerActionSetPerspOctantRemoval } from "src/services/state/ngViewerState/actions";
+import { ngViewerSelectorOctantRemoval } from "src/services/state/ngViewerState/selectors";
+import { viewerStateCustomLandmarkSelector, viewerStateSelectedTemplatePureSelector } from "src/services/state/viewerState/selectors";
+import { NehubaViewerUnit } from "src/viewerModule/nehuba";
+import { NEHUBA_INSTANCE_INJTKN } from "src/viewerModule/nehuba/util";
+import { ARIA_LABELS } from 'common/constants'
+import { actionSetAuxMeshes, selectorAuxMeshes } from "../../store";
+import { FormBuilder, FormControl, FormGroup } from "@angular/forms";
+
+@Component({
+  selector: 'viewer-ctrl-component',
+  templateUrl: './viewerCtrlCmp.template.html',
+  styleUrls: [
+    './viewerCtrlCmp.style.css'
+  ],
+  exportAs: 'viewerCtrlCmp'
+})
+
+export class ViewerCtrlCmp{
+
+  public ARIA_LABELS = ARIA_LABELS
+
+  @HostBinding('attr.darktheme')
+  darktheme = false
+
+  private _flagDelin = true
+  get flagDelin(){
+    return this._flagDelin
+  }
+  set flagDelin(flag){
+    this._flagDelin = flag
+    this.toggleParcVsbl()
+  }
+
+  private sub: Subscription[] = []
+  private hiddenLayerNames: string[] = []
+
+  private _removeOctantFlag: boolean
+  get removeOctantFlag(){
+    return this._removeOctantFlag
+  }
+  set removeOctantFlag(val){
+    this._removeOctantFlag = val
+    this.setOctantRemoval(this._removeOctantFlag)
+  }
+
+  public nehubaViewerPerspectiveOctantRemoval$ = this.store$.pipe(
+    select(ngViewerSelectorOctantRemoval),
+  )
+
+  public customLandmarks$: Observable<any> = this.store$.pipe(
+    select(viewerStateCustomLandmarkSelector),
+    map(lms => lms.map(lm => ({
+      ...lm,
+      geometry: {
+        position: lm.position
+      }
+    }))),
+  )
+
+  public auxMeshFormGroup: FormGroup
+  private auxMeshesNamesSet: Set<string> = new Set()
+  public auxMeshes$ = this.store$.pipe(
+    select(selectorAuxMeshes),
+  )
+
+  constructor(
+    private store$: Store<any>,
+    formBuilder: FormBuilder,
+    @Optional() @Inject(NEHUBA_INSTANCE_INJTKN) private nehubaInst$: Observable<NehubaViewerUnit>,
+  ){
+
+    this.auxMeshFormGroup = formBuilder.group({})
+  
+
+    if (this.nehubaInst$) {
+      this.sub.push(
+        combineLatest([
+          this.customLandmarks$,
+          this.nehubaInst$,
+        ]).pipe(
+          filter(([_, neubaInst]) => !!neubaInst),
+        ).subscribe(([landmarks, nehubainst]) => {
+          this.setOctantRemoval(landmarks.length === 0)
+          nehubainst.updateUserLandmarks(landmarks)
+        })
+      )
+    } else {
+      console.warn(`NEHUBA_INSTANCE_INJTKN not provided`)
+    }
+
+    this.sub.push(
+      this.store$.pipe(
+        select(viewerStateSelectedTemplatePureSelector)
+      ).subscribe(tmpl => {
+        const { useTheme } = tmpl || {}
+        this.darktheme = useTheme === 'dark'
+      }),
+
+      this.nehubaViewerPerspectiveOctantRemoval$.subscribe(
+        flag => this.removeOctantFlag = flag
+      ),
+
+      merge(
+        of(null),
+        this.auxMeshes$,
+      ).pipe(
+        pairwise()
+      ).subscribe(([oldMeshes, meshes]) => {
+        if (!!oldMeshes) {
+          for (const mesh of oldMeshes) {
+            this.auxMeshFormGroup.removeControl(mesh['@id'])
+          }
+        }
+        if (meshes === null) {
+          return
+        }
+        this.auxMeshesNamesSet.clear()
+        for (const mesh of meshes) {
+          this.auxMeshesNamesSet.add(mesh.ngId)
+          this.auxMeshFormGroup.addControl(mesh['@id'], new FormControl(mesh.visible))
+        }
+      }),
+
+      this.auxMeshFormGroup.valueChanges.pipe(
+        withLatestFrom(this.auxMeshes$)
+      ).subscribe(([v, auxMeshes]) => {
+        if (!auxMeshes) return
+
+        let changed = false
+        const auxMeshesCopy = JSON.parse(JSON.stringify(auxMeshes))
+        for (const key in v) {
+          const found = auxMeshesCopy.find(mesh => mesh['@id'] === key)
+          if (found && found.visible !== v[key]) {
+            changed = true
+            found.visible = v[key]
+          }
+        }
+
+        if (changed) {
+          this.store$.dispatch(
+            actionSetAuxMeshes({
+              payload: auxMeshesCopy
+            })
+          )
+        }
+      })
+    )
+  }
+
+  private toggleParcVsbl(){
+    const visibleParcLayers = ((window as any).viewer.layerManager.managedLayers)
+      .slice(1)
+      .filter(({ visible }) => visible)
+      .filter(layer => !this.auxMeshesNamesSet.has(layer.name))
+
+    if (this.flagDelin) {
+      for (const name of this.hiddenLayerNames) {
+        const l = (window as any).viewer.layerManager.getLayerByName(name)
+        l && l.setVisible(true)
+      }
+      this.hiddenLayerNames = []
+    } else {
+      this.hiddenLayerNames = []
+      for (const { name } of visibleParcLayers) {
+        const l = (window as any).viewer.layerManager.getLayerByName(name)
+        l && l.setVisible(false)
+        this.hiddenLayerNames.push( name )
+      }
+    }
+    
+    setTimeout(() => {
+      (window as any).viewer.display.scheduleRedraw()
+    })
+  }
+
+  public setOctantRemoval(octantRemovalFlag: boolean) {
+    this.store$.dispatch(
+      ngViewerActionSetPerspOctantRemoval({
+        octantRemovalFlag
+      })
+    )
+  }
+
+  public trackByAtId(_idx: number, obj: { ['@id']: string }) {
+    return obj['@id']
+  }
+}
diff --git a/src/viewerModule/nehuba/viewerCtrl/viewerCtrlCmp/viewerCtrlCmp.style.css b/src/viewerModule/nehuba/viewerCtrl/viewerCtrlCmp/viewerCtrlCmp.style.css
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/src/viewerModule/nehuba/viewerCtrl/viewerCtrlCmp/viewerCtrlCmp.template.html b/src/viewerModule/nehuba/viewerCtrl/viewerCtrlCmp/viewerCtrlCmp.template.html
new file mode 100644
index 0000000000000000000000000000000000000000..a1a1507eedbdcf739c18c24f77642fb397d6df84
--- /dev/null
+++ b/src/viewerModule/nehuba/viewerCtrl/viewerCtrlCmp/viewerCtrlCmp.template.html
@@ -0,0 +1,43 @@
+<h3 class="iv-custom-comp text mat-h3">
+  Volumes
+</h3>
+
+<mat-slide-toggle [(ngModel)]="flagDelin"
+  #delinToggle="matSlideToggle"
+  [iav-key-listener]="[{ type: 'keydown', key: 'q', target: 'document', capture: true }]"
+  (iav-key-event)="delinToggle.toggle()"
+  name="toggle-delineation">
+
+  <markdown-dom class="d-inline-block iv-custom-comp text">
+    Show delineations `[q]`
+  </markdown-dom>
+</mat-slide-toggle>
+
+<mat-divider class="mt-2 mb-2"></mat-divider>
+
+<h3 class="iv-custom-comp text mat-h3">
+  Perspective View
+</h3>
+
+<mat-slide-toggle [(ngModel)]="removeOctantFlag"
+  [aria-label]="ARIA_LABELS.TOGGLE_FRONTAL_OCTANT"
+  name="remove-frontal-octant">
+  <span class="iv-custom-comp text">
+    Remove frontal octant
+  </span>
+</mat-slide-toggle>
+
+<ng-container *ngIf="auxMeshes$ | async as auxMeshes">
+  <mat-divider class="mt-1 mb-1"></mat-divider>
+  <form [formGroup]="auxMeshFormGroup">
+    <mat-slide-toggle *ngFor="let auxMesh of auxMeshes; trackBy: trackByAtId"
+      [formControlName]="auxMesh['@id']"
+      class="d-block"
+      [name]="'toggle-aux-mesh-' + auxMesh['@id']">
+      <span class="iv-custom-comp text">
+        {{ auxMesh.displayName || auxMesh.name }}
+      </span>
+    </mat-slide-toggle>
+  </form>
+</ng-container>
+