diff --git a/docs/releases/v2.6.3.md b/docs/releases/v2.6.3.md
new file mode 100644
index 0000000000000000000000000000000000000000..eb412372db38cd0f28fb4aabac6c2f2e56fab199
--- /dev/null
+++ b/docs/releases/v2.6.3.md
@@ -0,0 +1,6 @@
+# v2.6.3
+
+## Bugfixes
+
+- Fixed an issue where inter-space selection of parcellation was not possible.
+
diff --git a/e2e/checklist.md b/e2e/checklist.md
index 3c0cbe0a538168ea49aeff84877386c05826459b..66a6cb964f93e573b02ddc31de65f0f12da1e3e8 100644
--- a/e2e/checklist.md
+++ b/e2e/checklist.md
@@ -44,6 +44,10 @@
     - [ ] Explore in other templates exists, and has MNI152 and big brain
       - [ ] clicking on the respective space will load julich 2.9 in that space
       - [ ] the navigation should be preserved
+  - [ ] switching template/parc
+    - [ ] mni152 julich brain 29 (big brain) -> big brain julich brain 29
+    - [ ] mni152 julich brain 29 (cortical layer) -> big brain cortical layer
+    - [ ] mni152 long bundle (dismiss) -> mni152 julich brain 29
   - [ ] in big brain v2.9 (or latest)
     - [ ] high res hoc1, hoc2, hoc3, lam1-6 are visible
     - [ ] pli dataset [link](https://siibra-explorer.apps.hbp.eu/staging/?templateSelected=Big+Brain+%28Histology%29&parcellationSelected=Grey%2FWhite+matter&cNavigation=0.0.0.-W000.._eCwg.2-FUe3._-s_W.2_evlu..7LIx..1uaTK.Bq5o~.lKmo~..NBW&previewingDatasetFiles=%5B%7B%22datasetId%22%3A%22minds%2Fcore%2Fdataset%2Fv1.0.0%2Fb08a7dbc-7c75-4ce7-905b-690b2b1e8957%22%2C%22filename%22%3A%22Overlay+of+data+modalities%22%7D%5D)
diff --git a/mkdocs.yml b/mkdocs.yml
index 01b07eb3b9759e89e7fe1fb66ec0b143a1b97c04..cab1a74d9e8a1b66fbb0973d13a80b963a6c5d20 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -16,13 +16,6 @@ markdown_extensions:
 
 plugins:
   - search
-  # - errandkun:
-  #     extract_path: docs/autogen_images
-  #     external_resources:
-  #     - type: github
-  #       owner: fzj-inm1-bda
-  #       repo: interactive-viewer
-  #       workflow_name: e2e
 
 pages:
   - Home: 'index.md'
@@ -40,6 +33,7 @@ pages:
     - Fetching datasets: 'advanced/datasets.md'
     - Display non-atlas volumes: 'advanced/otherVolumes.md'
   - Release notes:
+    - v2.6.3: 'releases/v2.6.3.md'
     - v2.6.2: 'releases/v2.6.2.md'
     - v2.6.1: 'releases/v2.6.1.md'
     - v2.6.0: 'releases/v2.6.0.md'
diff --git a/package.json b/package.json
index 70b5d8a08c41ad69cf3fbfd2c8d95a4523064619..b14053107f5e2e9d41b303667692ea69022ed7e9 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "interactive-viewer",
-  "version": "2.6.2",
+  "version": "2.6.3",
   "description": "HBP interactive atlas viewer. Integrating KG query, dataset previews & more. Based on humanbrainproject/nehuba & google/neuroglancer. Built with angular",
   "scripts": {
     "build-aot": "ng build && node ./third_party/matomo/processMatomo.js",
diff --git a/src/atlasComponents/uiSelectors/atlasLayerSelector/atlasLayerSelector.component.spec.ts b/src/atlasComponents/uiSelectors/atlasLayerSelector/atlasLayerSelector.component.spec.ts
new file mode 100644
index 0000000000000000000000000000000000000000..730f7b258819bf92a3a678976bead30a75817452
--- /dev/null
+++ b/src/atlasComponents/uiSelectors/atlasLayerSelector/atlasLayerSelector.component.spec.ts
@@ -0,0 +1,100 @@
+import { CommonModule } from "@angular/common"
+import { ComponentFixture, TestBed } from "@angular/core/testing"
+import { NoopAnimationsModule } from "@angular/platform-browser/animations"
+import { MockStore, provideMockStore } from "@ngrx/store/testing"
+import { ComponentsModule } from "src/components"
+import { viewerStateSelectTemplateWithId, viewerStateToggleLayer } from "src/services/state/viewerState.store.helper"
+import { AngularMaterialModule } from "src/sharedModules"
+import { QuickTourModule } from "src/ui/quickTour"
+import { GetGroupedParcPipe } from "../pipes/getGroupedParc.pipe"
+import { GetIndividualParcPipe } from "../pipes/getIndividualParc.pipe"
+import { GetNonbaseParcPipe } from "../pipes/getNonBaseParc.pipe"
+import { AtlasLayerSelector } from "./atlasLayerSelector.component"
+
+describe("> atlasLayerSelector.component.ts", () => {
+  describe("> AtlasLayerSelector", () => {
+    let fixture: ComponentFixture<AtlasLayerSelector>
+    beforeEach(async () => {
+      await TestBed.configureTestingModule({
+        imports: [
+          CommonModule,
+          AngularMaterialModule,
+          NoopAnimationsModule,
+          QuickTourModule,
+          ComponentsModule,
+        ],
+        declarations: [
+          AtlasLayerSelector,
+          GetIndividualParcPipe,
+          GetNonbaseParcPipe,
+          GetGroupedParcPipe,
+        ],
+        providers: [
+          provideMockStore()
+        ]
+      }).compileComponents()
+    })
+
+    it("> can be init", () => {
+      fixture = TestBed.createComponent(AtlasLayerSelector)
+      expect(fixture).toBeTruthy()
+    })
+
+    describe("> methods", () => {
+      beforeEach(() => {
+        fixture = TestBed.createComponent(AtlasLayerSelector)
+      })
+      describe("> selectParcellationWithName", () => {
+        let tmplSupportParcPipeTransform: jasmine.Spy
+        let storeDispatchSpy: jasmine.Spy
+        const dummySelectedTmpl = {
+          "this": "obj"
+        }
+        const dummyParc = {
+          "foo": "bar",
+          "availableIn": [{
+            "baz": "yoo"
+          }]
+        }
+        beforeEach(() => {
+          tmplSupportParcPipeTransform = spyOn(fixture.componentInstance['currTmplSupportParcPipe'], 'transform')
+          const store = TestBed.inject(MockStore)
+          storeDispatchSpy = spyOn(store, 'dispatch')
+          fixture.componentInstance['selectedTemplate'] = dummySelectedTmpl
+        })
+        afterEach(() => {
+          if (tmplSupportParcPipeTransform) {
+            tmplSupportParcPipeTransform.calls.reset()
+          }
+        })
+        it("> calls pipe.transform", () => {
+          tmplSupportParcPipeTransform.and.returnValue(true)
+          fixture.componentInstance.selectParcellationWithName(dummyParc)
+          expect(tmplSupportParcPipeTransform).toHaveBeenCalledWith(dummySelectedTmpl, dummyParc)
+          expect(storeDispatchSpy).toHaveBeenCalledTimes(1)
+        })
+        
+        const tmplChgReqParam = [true, false]
+        
+        for (const tmplChgReq of tmplChgReqParam) {
+          describe(`> tmplChgReq: ${tmplChgReq}`, () => {
+            it("> expect the correct type of method to be called", () => {
+              tmplSupportParcPipeTransform.and.returnValue(!tmplChgReq)
+              fixture.componentInstance.selectParcellationWithName(dummyParc)
+              const allArgs = storeDispatchSpy.calls.allArgs()
+              expect(allArgs.length).toEqual(1)
+              expect(allArgs[0].length).toEqual(1)
+              const action = allArgs[0][0]
+
+              const expectedAction = tmplChgReq
+                ? viewerStateSelectTemplateWithId
+                : viewerStateToggleLayer
+
+              expect(action.type).toEqual(expectedAction.type)
+            })
+          })
+        }
+      })
+    })
+  })
+})
diff --git a/src/atlasComponents/uiSelectors/atlasLayerSelector/atlasLayerSelector.component.ts b/src/atlasComponents/uiSelectors/atlasLayerSelector/atlasLayerSelector.component.ts
index 1752a7d5f686fbd441993f3a33898f9b194b0744..9fbca8cce700ba9ef5bef01581a618e451308df3 100644
--- a/src/atlasComponents/uiSelectors/atlasLayerSelector/atlasLayerSelector.component.ts
+++ b/src/atlasComponents/uiSelectors/atlasLayerSelector/atlasLayerSelector.component.ts
@@ -134,12 +134,13 @@ export class AtlasLayerSelector implements OnInit, OnDestroy {
   private currTmplSupportParcPipe = new CurrentTmplSupportsParcPipe()
 
   selectParcellationWithName(layer: any) {
-    const tmplChangeReq = this.currTmplSupportParcPipe.transform(this.selectedTemplate, layer)
+    const tmplChangeReq = !this.currTmplSupportParcPipe.transform(this.selectedTemplate, layer)
     if (!tmplChangeReq) {
       this.store$.dispatch(
         viewerStateToggleLayer({ payload: layer })
       )
     } else {
+      this.showOverlayIntent$.next(true)
       this.store$.dispatch(
         viewerStateSelectTemplateWithId({
           payload: layer.availableIn[0],
diff --git a/src/atlasComponents/uiSelectors/module.ts b/src/atlasComponents/uiSelectors/module.ts
index 384dc294ca684560a8d8b0cf7f71d85b7fb488f4..b6994ea3003f3dbe9815b2986507cd7fdeea20a5 100644
--- a/src/atlasComponents/uiSelectors/module.ts
+++ b/src/atlasComponents/uiSelectors/module.ts
@@ -10,7 +10,7 @@ import { AtlaslayerTooltipPipe } from "./pipes/atlasLayerTooltip.pipe";
 import { ComponentsModule } from "src/components";
 import { GetNonbaseParcPipe } from "./pipes/getNonBaseParc.pipe";
 import { GetIndividualParcPipe } from "./pipes/getIndividualParc.pipe";
-import { getGroupedParcPipe } from "./pipes/getGroupedParc.pipe";
+import { GetGroupedParcPipe } from "./pipes/getGroupedParc.pipe";
 import { CurrentTmplSupportsParcPipe } from "./pipes/currTmplSupportsParc.pipe";
 import { GroupParcSelectedPipe } from "./pipes/groupParcSelected.pipe";
 import { GetPreviewUrlPipe } from "./pipes/getPreviewUrl.pipe";
@@ -36,7 +36,7 @@ import { SiibraExplorerTemplateModule } from "../template";
     AtlaslayerTooltipPipe,
     GetNonbaseParcPipe,
     GetIndividualParcPipe,
-    getGroupedParcPipe,
+    GetGroupedParcPipe,
     CurrentTmplSupportsParcPipe,
     GroupParcSelectedPipe,
     CurrParcSupportsTmplPipe,
diff --git a/src/atlasComponents/uiSelectors/pipes/currParcSupportsTmpl.pipe.ts b/src/atlasComponents/uiSelectors/pipes/currParcSupportsTmpl.pipe.ts
index 77fd66327ee0a4fa5bd004d46474d9ff5a95fb0a..dcdf13d404ba747a5ce65f9f1bbe6fb08189b196 100644
--- a/src/atlasComponents/uiSelectors/pipes/currParcSupportsTmpl.pipe.ts
+++ b/src/atlasComponents/uiSelectors/pipes/currParcSupportsTmpl.pipe.ts
@@ -12,7 +12,7 @@ export class CurrParcSupportsTmplPipe implements PipeTransform{
      * buggy. says julich brain v290 is not supported in fsaverage
      * related to https://github.com/FZJ-INM1-BDA/siibra-python/issues/98 
      */
-    const parcSupportTmpl = (p: any) => !!(tmpl.availableIn || []).find(tmplP => tmplP['@id'] === p['@id'])
+    const parcSupportTmpl = (p: any) => !!(tmpl.availableIn || []).find(tmplP => tmplP['@id'] === p && p['@id'])
     return Array.isArray(parc)
       ? parc.some(parcSupportTmpl)
       : parcSupportTmpl(parc)
diff --git a/src/atlasComponents/uiSelectors/pipes/getGroupedParc.pipe.ts b/src/atlasComponents/uiSelectors/pipes/getGroupedParc.pipe.ts
index 683d9d7904e588d64d734118723b60f577f20b7b..cd98f91a417520f57af7f9ae9952ffd134716a8f 100644
--- a/src/atlasComponents/uiSelectors/pipes/getGroupedParc.pipe.ts
+++ b/src/atlasComponents/uiSelectors/pipes/getGroupedParc.pipe.ts
@@ -8,7 +8,7 @@ type TReturn = {
   name: 'getGroupedParc',
   pure: true
 })
-export class getGroupedParcPipe implements PipeTransform{
+export class GetGroupedParcPipe implements PipeTransform{
 
   public transform(arr: any[]):TReturn{
     const returnObj: TReturn = {}