diff --git a/packages/dataverse/src/derivations/prism/prism.ts b/packages/dataverse/src/derivations/prism/prism.ts
index 962aab0..04d762b 100644
--- a/packages/dataverse/src/derivations/prism/prism.ts
+++ b/packages/dataverse/src/derivations/prism/prism.ts
@@ -172,7 +172,7 @@ type IEffect = {
 const memosWeakMap = new WeakMap<PrismScope, Record<string, IMemo>>()
 
 type IMemo = {
-  deps: undefined | unknown[]
+  deps: undefined | unknown[] | ReadonlyArray<unknown>
   cachedValue: unknown
 }
 
@@ -229,8 +229,8 @@ function effect(key: string, cb: () => () => void, deps?: unknown[]): void {
 }
 
 function depsHaveChanged(
-  oldDeps: undefined | unknown[],
-  newDeps: undefined | unknown[],
+  oldDeps: undefined | unknown[] | ReadonlyArray<unknown>,
+  newDeps: undefined | unknown[] | ReadonlyArray<unknown>,
 ): boolean {
   if (oldDeps === undefined || newDeps === undefined) {
     return true
@@ -244,7 +244,7 @@ function depsHaveChanged(
 function memo<T>(
   key: string,
   fn: () => T,
-  deps: undefined | $IntentionalAny[],
+  deps: undefined | $IntentionalAny[] | ReadonlyArray<$IntentionalAny>,
 ): T {
   const scope = hookScopeStack.peek()
   if (!scope) {
diff --git a/packages/plugin-r3f/src/components/Editor.tsx b/packages/plugin-r3f/src/components/SnapshotEditor.tsx
similarity index 87%
rename from packages/plugin-r3f/src/components/Editor.tsx
rename to packages/plugin-r3f/src/components/SnapshotEditor.tsx
index 2d431e5..692be6d 100644
--- a/packages/plugin-r3f/src/components/Editor.tsx
+++ b/packages/plugin-r3f/src/components/SnapshotEditor.tsx
@@ -62,19 +62,17 @@ const EditorScene = () => {
   )
 }
 
-const Wrapper = styled.div<{visible: boolean}>`
+const Wrapper = styled.div`
   tab-size: 4;
   line-height: 1.15; /* 1 */
   -webkit-text-size-adjust: 100%; /* 2 */
   margin: 0;
 
-  position: fixed;
+  position: absolute;
   top: 0px;
   right: 0px;
   bottom: 0px;
   left: 0px;
-  z-index: 50;
-  display: ${(props) => (props.visible ? 'block' : 'none')};
 `
 
 const CanvasWrapper = styled.div`
@@ -83,7 +81,9 @@ const CanvasWrapper = styled.div`
   height: 100%;
 `
 
-const Editor: VFC = () => {
+const SnapshotEditor: VFC = () => {
+  console.log('Snapshot editor!!')
+
   const [editorObject, sceneSnapshot, initialEditorCamera, createSnapshot] =
     useEditorStore(
       (state) => [
@@ -95,10 +95,18 @@ const Editor: VFC = () => {
       shallow,
     )
 
-  const editorOpen = !!useVal(editorObject?.props.isOpen)
+  const editorOpen = true
   useLayoutEffect(() => {
+    let timeout: NodeJS.Timeout | undefined
     if (editorOpen) {
-      createSnapshot()
+      // a hack to make sure all the scene's props are
+      // applied before we take a snapshot
+      timeout = setTimeout(createSnapshot, 100)
+    }
+    return () => {
+      if (timeout !== undefined) {
+        clearTimeout(timeout)
+      }
     }
   }, [editorOpen])
 
@@ -109,8 +117,7 @@ const Editor: VFC = () => {
       <StyleSheetManager disableVendorPrefixes>
         <>
           <GlobalStyle />
-          <Wrapper id="theatre-plugin-r3f-root" visible={true}>
-            {/* <Toolbar /> */}
+          <Wrapper>
             {sceneSnapshot ? (
               <>
                 <CanvasWrapper>
@@ -140,4 +147,4 @@ const Editor: VFC = () => {
   )
 }
 
-export default Editor
+export default SnapshotEditor
diff --git a/packages/plugin-r3f/src/components/Toolbar/Toolbar.tsx b/packages/plugin-r3f/src/components/Toolbar/Toolbar.tsx
index 7162563..caefaf0 100644
--- a/packages/plugin-r3f/src/components/Toolbar/Toolbar.tsx
+++ b/packages/plugin-r3f/src/components/Toolbar/Toolbar.tsx
@@ -10,7 +10,7 @@ import {Vector3} from 'three'
 import type {$FixMe} from '@theatre/shared/utils/types'
 import studio from '@theatre/studio'
 import {getSelected} from '../useSelected'
-import {useVal} from '@theatre/dataverse-react'
+import {usePrism, useVal} from '@theatre/dataverse-react'
 import IconButton from './utils/IconButton'
 import styled from 'styled-components'
 
@@ -19,6 +19,10 @@ const ToolGroup = styled.div`
 `
 
 const Toolbar: VFC = () => {
+  usePrism(() => {
+    const panes = studio.getPanesOfType('snapshotEditor')
+  }, [])
+
   const [editorObject] = useEditorStore(
     (state) => [state.editorObject],
     shallow,
@@ -35,6 +39,15 @@ const Toolbar: VFC = () => {
 
   return (
     <>
+      <ToolGroup>
+        <button
+          onClick={() => {
+            studio.createPane('snapshotEditor')
+          }}
+        >
+          Create snapshot
+        </button>
+      </ToolGroup>
       <ToolGroup>
         <TransformControlsModeSelect
           value={transformControlsMode}
diff --git a/packages/plugin-r3f/src/index.tsx b/packages/plugin-r3f/src/index.tsx
index 4c5a86d..1f0e3f0 100644
--- a/packages/plugin-r3f/src/index.tsx
+++ b/packages/plugin-r3f/src/index.tsx
@@ -1,6 +1,4 @@
-import React from 'react'
-import {render} from 'react-dom'
-import Editor from './components/Editor'
+import SnapshotEditor from './components/SnapshotEditor'
 
 export {default as EditorHelper} from './components/EditorHelper'
 export type {EditorHelperProps} from './components/EditorHelper'
@@ -10,6 +8,7 @@ export {bindToCanvas} from './store'
 export type {EditableState, BindFunction} from './store'
 import studio from '@theatre/studio'
 import Toolbar from './components/Toolbar/Toolbar'
+import {types} from '@theatre/core'
 
 if (process.env.NODE_ENV === 'development') {
   studio.extend({
@@ -17,9 +16,14 @@ if (process.env.NODE_ENV === 'development') {
     globalToolbar: {
       component: Toolbar,
     },
+    panes: [
+      {
+        class: 'snapshotEditor',
+        dataType: types.compound({
+          grosse: types.number(20),
+        }),
+        component: SnapshotEditor,
+      },
+    ],
   })
-  const editorRoot = document.createElement('div')
-  document.body.appendChild(editorRoot)
-
-  render(<Editor />, editorRoot)
 }
diff --git a/theatre/core/src/CoreBundle.ts b/theatre/core/src/CoreBundle.ts
index 6b34b6a..47cd948 100644
--- a/theatre/core/src/CoreBundle.ts
+++ b/theatre/core/src/CoreBundle.ts
@@ -1,10 +1,12 @@
 import type {Studio} from '@theatre/studio/Studio'
 import projectsSingleton from './projects/projectsSingleton'
 import {privateAPI} from './privateAPIs'
+import * as coreExports from './coreExports'
 
 export type CoreBits = {
   projectsP: typeof projectsSingleton.atom.pointer.projects
   privateAPI: typeof privateAPI
+  coreExports: typeof coreExports
 }
 
 export default class CoreBundle {
@@ -27,6 +29,7 @@ export default class CoreBundle {
     const bits: CoreBits = {
       projectsP: projectsSingleton.atom.pointer.projects,
       privateAPI: privateAPI,
+      coreExports,
     }
 
     callback(bits)
diff --git a/theatre/studio/src/PaneManager.ts b/theatre/studio/src/PaneManager.ts
new file mode 100644
index 0000000..a1df535
--- /dev/null
+++ b/theatre/studio/src/PaneManager.ts
@@ -0,0 +1,121 @@
+import {prism, val} from '@theatre/dataverse'
+import {emptyArray} from '@theatre/shared/utils'
+import SimpleCache from '@theatre/shared/utils/SimpleCache'
+import type {$FixMe, $IntentionalAny} from '@theatre/shared/utils/types'
+import type {Studio} from './Studio'
+import type {PaneInstance} from './TheatreStudio'
+
+export default class PaneManager {
+  private readonly _cache = new SimpleCache()
+
+  constructor(private readonly _studio: Studio) {
+    this._instantiatePanesAsTheyComeIn()
+  }
+
+  private _instantiatePanesAsTheyComeIn() {
+    const allPanesD = this._getAllPanes()
+    allPanesD.changesWithoutValues().tap(() => {
+      allPanesD.getValue()
+    })
+  }
+
+  private _getAllPanes() {
+    return this._cache.get('_getAllPanels()', () =>
+      prism((): {[instanceId in string]?: PaneInstance<string>} => {
+        const core = val(this._studio.coreP)
+        if (!core) return {}
+        const instanceDescriptors = val(
+          this._studio.atomP.historic.panelInstanceDesceriptors,
+        )
+        const paneClasses = val(
+          this._studio.atomP.ephemeral.extensions.paneClasses,
+        )
+
+        const instances: {[instanceId in string]?: PaneInstance<string>} = {}
+        for (const [, instanceDescriptor] of Object.entries(
+          instanceDescriptors,
+        )) {
+          const panelClass = paneClasses[instanceDescriptor!.paneClass]
+          if (!panelClass) continue
+          const {instanceId} = instanceDescriptor!
+          const {extensionId, classDefinition: definition} = panelClass
+
+          const instance = prism.memo(
+            `instance-${instanceDescriptor!.instanceId}`,
+            () => {
+              const object = this._studio
+                .getExtensionSheet(extensionId, core)
+                .object(
+                  'Pane: ' + instanceId,
+                  null,
+                  core.types.compound({
+                    panelThingy: core.types.boolean(false),
+                  }),
+                ) as $FixMe
+
+              const inst: PaneInstance<$IntentionalAny> = {
+                extensionId,
+                instanceId,
+                object,
+                definition,
+              }
+              return inst
+            },
+            emptyArray,
+          )
+
+          instances[instanceId] = instance
+        }
+        return instances
+      }),
+    )
+  }
+
+  get allPanesD() {
+    return this._getAllPanes()
+  }
+
+  getPanesOfType<PaneClass extends string>(
+    paneClass: PaneClass,
+  ): PaneInstance<PaneClass>[] {
+    return []
+  }
+
+  createPane<PaneClass extends string>(
+    paneClass: PaneClass,
+  ): PaneInstance<PaneClass> {
+    const core = this._studio.core
+    if (!core) {
+      throw new Error(
+        `Can't create a pane because @theatre/core is not yet loaded`,
+      )
+    }
+
+    const extensionId = val(
+      this._studio.atomP.ephemeral.extensions.paneClasses[paneClass]
+        .extensionId,
+    )
+
+    const allPaneInstances = val(
+      this._studio.atomP.historic.panelInstanceDesceriptors,
+    )
+    let instanceId!: string
+    for (let i = 1; i < 1000; i++) {
+      instanceId = `${paneClass} #${i}`
+      if (!allPaneInstances[instanceId]) break
+    }
+
+    if (!extensionId) {
+      throw new Error(`Pance class "${paneClass}" is not registered.`)
+    }
+
+    this._studio.transaction(({drafts}) => {
+      drafts.historic.panelInstanceDesceriptors[instanceId] = {
+        instanceId,
+        paneClass,
+      }
+    })
+
+    return this._getAllPanes().getValue()[instanceId]!
+  }
+}
diff --git a/theatre/studio/src/Studio.ts b/theatre/studio/src/Studio.ts
index 3adc4fb..bb21e3f 100644
--- a/theatre/studio/src/Studio.ts
+++ b/theatre/studio/src/Studio.ts
@@ -1,5 +1,4 @@
 import Scrub from '@theatre/studio/Scrub'
-import type {FullStudioState} from '@theatre/studio/store'
 import type {StudioHistoricState} from '@theatre/studio/store/types/historic'
 import UI from '@theatre/studio/UI'
 import type {Pointer} from '@theatre/dataverse'
@@ -14,10 +13,14 @@ import TheatreStudio from './TheatreStudio'
 import {nanoid} from 'nanoid/non-secure'
 import type Project from '@theatre/core/projects/Project'
 import type {CoreBits} from '@theatre/core/CoreBundle'
-import type {privateAPI} from '@theatre/core/privateAPIs'
+import SimpleCache from '@theatre/shared/utils/SimpleCache'
+import type {IProject, ISheet} from '@theatre/core'
+import PaneManager from './PaneManager'
+import type * as _coreExports from '@theatre/core/coreExports'
+
+export type CoreExports = typeof _coreExports
 
 export class Studio {
-  readonly atomP: Pointer<FullStudioState>
   readonly ui!: UI
   readonly publicApi: IStudio
   readonly address: {studioId: string}
@@ -28,23 +31,27 @@ export class Studio {
     this._projectsProxy.pointer
 
   private readonly _store = new StudioStore()
-  private _corePrivateApi: typeof privateAPI | undefined
+  private _corePrivateApi: CoreBits['privateAPI'] | undefined
 
-  private _extensions: Atom<{byId: Record<string, IExtension>}> = new Atom({
-    byId: {},
-  })
-  readonly extensionsP = this._extensions.pointer.byId
+  private readonly _cache = new SimpleCache()
+  readonly paneManager: PaneManager
+
+  private _coreAtom = new Atom<{core?: CoreExports}>({})
+
+  get atomP() {
+    return this._store.atomP
+  }
 
   constructor() {
     this.address = {studioId: nanoid(10)}
     this.publicApi = new TheatreStudio(this)
-    this.atomP = this._store.atomP
 
     if (process.env.NODE_ENV !== 'test') {
       this.ui = new UI(this)
     }
 
     this._attachToIncomingProjects()
+    this.paneManager = new PaneManager(this)
   }
 
   get initialized() {
@@ -69,6 +76,7 @@ export class Studio {
 
   setCoreBits(coreBits: CoreBits) {
     this._corePrivateApi = coreBits.privateAPI
+    this._coreAtom.setIn(['core'], coreBits.coreExports)
     this._setProjectsP(coreBits.projectsP)
   }
 
@@ -96,6 +104,14 @@ export class Studio {
     return this._corePrivateApi
   }
 
+  get core() {
+    return this._coreAtom.getState().core
+  }
+
+  get coreP() {
+    return this._coreAtom.pointer.core
+  }
+
   extend(extension: IExtension) {
     if (!extension || typeof extension !== 'object') {
       throw new Error(`Extensions must be JS objects`)
@@ -105,12 +121,47 @@ export class Studio {
       throw new Error(`extension.id must be a string`)
     }
 
-    if (this._extensions.getState().byId[extension.id]) {
-      throw new Error(
-        `An extension with the id of ${extension.id} already exists`,
-      )
-    }
+    this.transaction(({drafts}) => {
+      if (drafts.ephemeral.extensions.byId[extension.id]) {
+        throw new Error(`Extension id "${extension.id}" is already defined`)
+      }
+      drafts.ephemeral.extensions.byId[extension.id] = extension
 
-    this._extensions.setIn(['byId', extension.id], extension)
+      const allPaneClasses = drafts.ephemeral.extensions.paneClasses
+
+      extension.panes?.forEach((classDefinition) => {
+        if (typeof classDefinition.class !== 'string') {
+          throw new Error(`pane.class must be a string`)
+        }
+
+        if (classDefinition.class.length < 3) {
+          throw new Error(
+            `pane.class should be a string with 3 or more characters`,
+          )
+        }
+
+        const existing = allPaneClasses[classDefinition.class]
+        if (existing) {
+          throw new Error(
+            `Pane class "${classDefinition.class}" already exists and is supplied by extension ${existing}`,
+          )
+        }
+
+        allPaneClasses[classDefinition.class] = {
+          extensionId: extension.id,
+          classDefinition: classDefinition,
+        }
+      })
+    })
+  }
+
+  getStudioProject(core: CoreExports): IProject {
+    return this._cache.get('getStudioProject', () => core.getProject('Studio'))
+  }
+
+  getExtensionSheet(extensionId: string, core: CoreExports): ISheet {
+    return this._cache.get('extensionSheet-' + extensionId, () =>
+      this.getStudioProject(core)!.sheet('Extension ' + extensionId),
+    )
   }
 }
diff --git a/theatre/studio/src/StudioStore/StudioStore.ts b/theatre/studio/src/StudioStore/StudioStore.ts
index 4d6daf6..33bced4 100644
--- a/theatre/studio/src/StudioStore/StudioStore.ts
+++ b/theatre/studio/src/StudioStore/StudioStore.ts
@@ -78,6 +78,10 @@ export default class StudioStore {
     }
   }
 
+  getState(): FullStudioState {
+    return this._reduxStore.getState()
+  }
+
   /**
    * This method causes the store to start the history from scratch. This is useful
    * for testing and development where you want to explicitly provide a state to the
diff --git a/theatre/studio/src/TheatreStudio.ts b/theatre/studio/src/TheatreStudio.ts
index b13001a..8637774 100644
--- a/theatre/studio/src/TheatreStudio.ts
+++ b/theatre/studio/src/TheatreStudio.ts
@@ -3,7 +3,7 @@ import studioTicker from '@theatre/studio/studioTicker'
 import type {IDerivation, Pointer} from '@theatre/dataverse'
 import {prism} from '@theatre/dataverse'
 import SimpleCache from '@theatre/shared/utils/SimpleCache'
-import type {$IntentionalAny, VoidFn} from '@theatre/shared/utils/types'
+import type {$FixMe, VoidFn} from '@theatre/shared/utils/types'
 import type {IScrub} from '@theatre/studio/Scrub'
 
 import type {Studio} from '@theatre/studio/Studio'
@@ -22,8 +22,10 @@ export interface ITransactionAPI {
   unset<V>(pointer: Pointer<V>): void
 }
 
-export interface IPanelType<DataType extends PropTypeConfig_Compound<{}>> {
-  sheetName: string
+export interface PaneClassDefinition<
+  DataType extends PropTypeConfig_Compound<{}>,
+> {
+  class: string
   dataType: DataType
   component: React.ComponentType<{
     id: string
@@ -41,7 +43,16 @@ export type IExtension = {
   globalToolbar?: {
     component: React.ComponentType<{}>
   }
-  panes?: Record<string, IPanelType<$IntentionalAny>>
+  panes?: Array<PaneClassDefinition<$FixMe>>
+}
+
+export type PaneInstance<ClassName extends string> = {
+  extensionId: string
+  instanceId: string
+  object: ISheetObject<
+    PropTypeConfig_Compound<{data: $FixMe; visible: PropTypeConfig_Boolean}>
+  >
+  definition: PaneClassDefinition<$FixMe>
 }
 
 export interface IStudio {
@@ -63,6 +74,14 @@ export interface IStudio {
   readonly selection: Array<ISheetObject>
 
   extend(extension: IExtension): void
+
+  getPanesOfType<PaneClass extends string>(
+    paneClass: PaneClass,
+  ): Array<PaneInstance<PaneClass>>
+
+  createPane<PaneClass extends string>(
+    paneClass: PaneClass,
+  ): PaneInstance<PaneClass>
 }
 
 export default class TheatreStudio implements IStudio {
@@ -138,4 +157,15 @@ export default class TheatreStudio implements IStudio {
   scrub(): IScrub {
     return getStudio().scrub()
   }
+
+  getPanesOfType<PaneClass extends string>(
+    paneClass: PaneClass,
+  ): PaneInstance<PaneClass>[] {
+    return getStudio().paneManager.getPanesOfType(paneClass)
+  }
+  createPane<PaneClass extends string>(
+    paneClass: PaneClass,
+  ): PaneInstance<PaneClass> {
+    return getStudio().paneManager.createPane(paneClass)
+  }
 }
diff --git a/theatre/studio/src/UIRoot/PanelsRoot.tsx b/theatre/studio/src/UIRoot/PanelsRoot.tsx
index 581b42d..d47cacc 100644
--- a/theatre/studio/src/UIRoot/PanelsRoot.tsx
+++ b/theatre/studio/src/UIRoot/PanelsRoot.tsx
@@ -2,10 +2,21 @@ import OutlinePanel from '@theatre/studio/panels/OutlinePanel/OutlinePanel'
 import ObjectEditorPanel from '@theatre/studio/panels/ObjectEditorPanel/ObjectEditorPanel'
 import React from 'react'
 import SequenceEditorPanel from '@theatre/studio/panels/SequenceEditorPanel/SequenceEditorPanel'
+import getStudio from '@theatre/studio/getStudio'
+import {useVal} from '@theatre/dataverse-react'
+import PaneWrapper from '@theatre/studio/panels/BasePanel/PaneWrapper'
 
 const PanelsRoot: React.FC = () => {
+  const panes = useVal(getStudio().paneManager.allPanesD)
+  const paneEls = Object.entries(panes).map(([instanceId, paneInstance]) => {
+    return (
+      <PaneWrapper key={`pane-${instanceId}`} paneInstance={paneInstance!} />
+    )
+  })
+
   return (
     <>
+      {paneEls}
       <OutlinePanel />
       <ObjectEditorPanel />
       <SequenceEditorPanel />
diff --git a/theatre/studio/src/panels/BasePanel/BasePanel.tsx b/theatre/studio/src/panels/BasePanel/BasePanel.tsx
index cd4fa60..8ccb3d6 100644
--- a/theatre/studio/src/panels/BasePanel/BasePanel.tsx
+++ b/theatre/studio/src/panels/BasePanel/BasePanel.tsx
@@ -2,7 +2,7 @@ import {val} from '@theatre/dataverse'
 import {usePrism} from '@theatre/dataverse-react'
 import type {$IntentionalAny} from '@theatre/shared/utils/types'
 import getStudio from '@theatre/studio/getStudio'
-import type {PanelId, PanelPosition} from '@theatre/studio/store/types'
+import type {PanelPosition} from '@theatre/studio/store/types'
 import React, {useContext} from 'react'
 import useWindowSize from 'react-use/esm/useWindowSize'
 import styled from 'styled-components'
@@ -15,7 +15,7 @@ const Container = styled.div`
 `
 
 type PanelStuff = {
-  panelId: PanelId
+  panelId: string
   dims: {
     width: number
     height: number
@@ -69,7 +69,7 @@ const PanelContext = React.createContext<PanelStuff>(null as $IntentionalAny)
 export const usePanel = () => useContext(PanelContext)
 
 const BasePanel: React.FC<{
-  panelId: PanelId
+  panelId: string
   defaultPosition: PanelPosition
   minDims: {width: number; height: number}
 }> = ({panelId, children, defaultPosition, minDims}) => {
diff --git a/theatre/studio/src/panels/BasePanel/PaneWrapper.tsx b/theatre/studio/src/panels/BasePanel/PaneWrapper.tsx
new file mode 100644
index 0000000..6fe602d
--- /dev/null
+++ b/theatre/studio/src/panels/BasePanel/PaneWrapper.tsx
@@ -0,0 +1,71 @@
+import type {$FixMe} from '@theatre/shared/utils/types'
+import type {PanelPosition} from '@theatre/studio/store/types'
+import type {PaneInstance} from '@theatre/studio/TheatreStudio'
+import React from 'react'
+import styled from 'styled-components'
+import {
+  F1,
+  F2 as F2Impl,
+} from '@theatre/studio/panels/ObjectEditorPanel/ObjectEditorPanel'
+import BasePanel from './BasePanel'
+import PanelDragZone from './PanelDragZone'
+import PanelWrapper from './PanelWrapper'
+
+const defaultPosition: PanelPosition = {
+  edges: {
+    left: {from: 'screenLeft', distance: 0.3},
+    right: {from: 'screenRight', distance: 0.3},
+    top: {from: 'screenTop', distance: 0.3},
+    bottom: {from: 'screenBottom', distance: 0.3},
+  },
+}
+
+const minDims = {width: 300, height: 300}
+
+const PaneWrapper: React.FC<{
+  paneInstance: PaneInstance<$FixMe>
+}> = ({paneInstance}) => {
+  return (
+    <BasePanel
+      panelId={`pane-${paneInstance.instanceId}`}
+      defaultPosition={defaultPosition}
+      minDims={minDims}
+    >
+      <Content paneInstance={paneInstance} />
+    </BasePanel>
+  )
+}
+
+const Container = styled(PanelWrapper)`
+  overflow-y: hidden;
+  display: flex;
+  flex-direction: column;
+`
+
+const Title = styled.div`
+  width: 100%;
+`
+
+const F2 = styled(F2Impl)`
+  position: relative;
+`
+
+const Content: React.FC<{paneInstance: PaneInstance<$FixMe>}> = ({
+  paneInstance,
+}) => {
+  const Comp = paneInstance.definition.component
+  return (
+    <Container>
+      <PanelDragZone>
+        <F1>
+          <Title>{paneInstance.instanceId}</Title>
+        </F1>
+      </PanelDragZone>
+      <F2>
+        <Comp id={paneInstance.instanceId} object={paneInstance.object} />
+      </F2>
+    </Container>
+  )
+}
+
+export default PaneWrapper
diff --git a/theatre/studio/src/store/index.ts b/theatre/studio/src/store/index.ts
index f125d59..d35ba8c 100644
--- a/theatre/studio/src/store/index.ts
+++ b/theatre/studio/src/store/index.ts
@@ -29,6 +29,7 @@ const initialState: StudioState = {
     },
     autoKey: true,
     coreByProject: {},
+    panelInstanceDesceriptors: {},
   },
   ephemeral: {
     initialised: false,
@@ -36,6 +37,10 @@ const initialState: StudioState = {
     projects: {
       stateByProjectId: {},
     },
+    extensions: {
+      byId: {},
+      paneClasses: {},
+    },
   },
 }
 
diff --git a/theatre/studio/src/store/stateEditors.ts b/theatre/studio/src/store/stateEditors.ts
index 21e0f65..51909a4 100644
--- a/theatre/studio/src/store/stateEditors.ts
+++ b/theatre/studio/src/store/stateEditors.ts
@@ -29,7 +29,6 @@ import {graphEditorColors} from '@theatre/studio/panels/SequenceEditorPanel/Grap
 import type {
   OutlineSelectable,
   OutlineSelectionState,
-  PanelId,
   PanelPosition,
 } from './types'
 import {uniq} from 'lodash-es'
@@ -67,7 +66,7 @@ namespace stateEditors {
     export namespace historic {
       export namespace panelPositions {
         export function setPanelPosition(p: {
-          panelId: PanelId
+          panelId: string
           position: PanelPosition
         }) {
           const h = drafts().historic
diff --git a/theatre/studio/src/store/types/ephemeral.ts b/theatre/studio/src/store/types/ephemeral.ts
index 2fe0373..1e59237 100644
--- a/theatre/studio/src/store/types/ephemeral.ts
+++ b/theatre/studio/src/store/types/ephemeral.ts
@@ -1,5 +1,13 @@
 import type {ProjectState} from '@theatre/core/projects/store/storeTypes'
-import type {SerializableMap, StrictRecord} from '@theatre/shared/utils/types'
+import type {
+  $IntentionalAny,
+  SerializableMap,
+  StrictRecord,
+} from '@theatre/shared/utils/types'
+import type {
+  IExtension,
+  PaneClassDefinition,
+} from '@theatre/studio/TheatreStudio'
 
 export type StudioEphemeralState = {
   initialised: boolean
@@ -22,4 +30,13 @@ export type StudioEphemeralState = {
       }
     >
   }
+  extensions: {
+    byId: {[extensionId in string]?: IExtension}
+    paneClasses: {
+      [paneClassName in string]?: {
+        extensionId: string
+        classDefinition: PaneClassDefinition<$IntentionalAny>
+      }
+    }
+  }
 }
diff --git a/theatre/studio/src/store/types/historic.ts b/theatre/studio/src/store/types/historic.ts
index 4095689..f402497 100644
--- a/theatre/studio/src/store/types/historic.ts
+++ b/theatre/studio/src/store/types/historic.ts
@@ -56,6 +56,11 @@ export type OutlineSelectionState =
 export type OutlineSelectable = Project | Sheet | SheetObject
 export type OutlineSelection = OutlineSelectable[]
 
+export type PanelInstanceDescriptor = {
+  instanceId: string
+  paneClass: string
+}
+
 export type StudioHistoricState = {
   projects: {
     stateByProjectId: StrictRecord<
@@ -77,7 +82,10 @@ export type StudioHistoricState = {
     >
   }
   panels?: Panels
-  panelPositions?: {[panelId in PanelId]?: PanelPosition}
+  panelPositions?: {[panelIdOrPaneId in string]?: PanelPosition}
+  panelInstanceDesceriptors: {
+    [instanceId in string]?: PanelInstanceDescriptor
+  }
   autoKey: boolean
   coreByProject: {[projectId in string]: ProjectState_Historic}
 }
diff --git a/theatre/studio/src/toolbars/GlobalToolbar/GlobalToolbar.tsx b/theatre/studio/src/toolbars/GlobalToolbar/GlobalToolbar.tsx
index d2447df..d5935bc 100644
--- a/theatre/studio/src/toolbars/GlobalToolbar/GlobalToolbar.tsx
+++ b/theatre/studio/src/toolbars/GlobalToolbar/GlobalToolbar.tsx
@@ -17,9 +17,10 @@ const Container = styled.div`
 
 const GlobalToolbar: React.FC<{}> = (props) => {
   const groups: Array<React.ReactNode> = []
-  const extensions = useVal(getStudio().extensionsP)
+  const extensionsById = useVal(getStudio().atomP.ephemeral.extensions.byId)
 
-  for (const [, extension] of Object.entries(extensions)) {
+  for (const [, extension] of Object.entries(extensionsById)) {
+    if (!extension) continue
     if (extension.globalToolbar) {
       groups.push(
         <extension.globalToolbar.component