diff --git a/packages/base/src/commands.ts b/packages/base/src/commands.ts
index 492116e6..97bd1df6 100644
--- a/packages/base/src/commands.ts
+++ b/packages/base/src/commands.ts
@@ -428,7 +428,11 @@ export function addCommands(
 
   commands.addCommand(CommandIDs.redo, {
     label: trans.__('Redo'),
-    isEnabled: () => Boolean(tracker.currentWidget),
+    isEnabled: () => {
+      return tracker.currentWidget
+        ? tracker.currentWidget.context.model.sharedModel.editable
+        : false;
+    },
     execute: args => {
       const current = tracker.currentWidget;
 
@@ -441,7 +445,11 @@ export function addCommands(
 
   commands.addCommand(CommandIDs.undo, {
     label: trans.__('Undo'),
-    isEnabled: () => Boolean(tracker.currentWidget),
+    isEnabled: () => {
+      return tracker.currentWidget
+        ? tracker.currentWidget.context.model.sharedModel.editable
+        : false;
+    },
     execute: args => {
       const current = tracker.currentWidget;
 
@@ -454,7 +462,11 @@ export function addCommands(
   commands.addCommand(CommandIDs.newSketch, {
     label: trans.__('New Sketch'),
     iconClass: 'fa fa-pencil',
-    isEnabled: () => Boolean(tracker.currentWidget),
+    isEnabled: () => {
+      return tracker.currentWidget
+        ? tracker.currentWidget.context.model.sharedModel.editable
+        : false;
+    },
     execute: async args => {
       const current = tracker.currentWidget;
 
@@ -478,63 +490,99 @@ export function addCommands(
 
   commands.addCommand(CommandIDs.newBox, {
     label: trans.__('New Box'),
-    isEnabled: () => Boolean(tracker.currentWidget),
+    isEnabled: () => {
+      return tracker.currentWidget
+        ? tracker.currentWidget.context.model.sharedModel.editable
+        : false;
+    },
     icon: boxIcon,
     execute: Private.createPart('box', tracker)
   });
 
   commands.addCommand(CommandIDs.newCylinder, {
     label: trans.__('New Cylinder'),
-    isEnabled: () => Boolean(tracker.currentWidget),
+    isEnabled: () => {
+      return tracker.currentWidget
+        ? tracker.currentWidget.context.model.sharedModel.editable
+        : false;
+    },
     icon: cylinderIcon,
     execute: Private.createPart('cylinder', tracker)
   });
 
   commands.addCommand(CommandIDs.newSphere, {
     label: trans.__('New Sphere'),
-    isEnabled: () => Boolean(tracker.currentWidget),
+    isEnabled: () => {
+      return tracker.currentWidget
+        ? tracker.currentWidget.context.model.sharedModel.editable
+        : false;
+    },
     icon: sphereIcon,
     execute: Private.createPart('sphere', tracker)
   });
 
   commands.addCommand(CommandIDs.newCone, {
     label: trans.__('New Cone'),
-    isEnabled: () => Boolean(tracker.currentWidget),
+    isEnabled: () => {
+      return tracker.currentWidget
+        ? tracker.currentWidget.context.model.sharedModel.editable
+        : false;
+    },
     icon: coneIcon,
     execute: Private.createPart('cone', tracker)
   });
 
   commands.addCommand(CommandIDs.newTorus, {
     label: trans.__('New Torus'),
-    isEnabled: () => Boolean(tracker.currentWidget),
+    isEnabled: () => {
+      return tracker.currentWidget
+        ? tracker.currentWidget.context.model.sharedModel.editable
+        : false;
+    },
     icon: torusIcon,
     execute: Private.createPart('torus', tracker)
   });
 
   commands.addCommand(CommandIDs.extrusion, {
     label: trans.__('Extrusion'),
-    isEnabled: () => Boolean(tracker.currentWidget),
+    isEnabled: () => {
+      return tracker.currentWidget
+        ? tracker.currentWidget.context.model.sharedModel.editable
+        : false;
+    },
     icon: extrusionIcon,
     execute: Private.executeOperator('extrusion', tracker)
   });
 
   commands.addCommand(CommandIDs.cut, {
     label: trans.__('Cut'),
-    isEnabled: () => Boolean(tracker.currentWidget),
+    isEnabled: () => {
+      return tracker.currentWidget
+        ? tracker.currentWidget.context.model.sharedModel.editable
+        : false;
+    },
     icon: cutIcon,
     execute: Private.executeOperator('cut', tracker)
   });
 
   commands.addCommand(CommandIDs.union, {
     label: trans.__('Union'),
-    isEnabled: () => Boolean(tracker.currentWidget),
+    isEnabled: () => {
+      return tracker.currentWidget
+        ? tracker.currentWidget.context.model.sharedModel.editable
+        : false;
+    },
     icon: unionIcon,
     execute: Private.executeOperator('union', tracker)
   });
 
   commands.addCommand(CommandIDs.intersection, {
     label: trans.__('Intersection'),
-    isEnabled: () => Boolean(tracker.currentWidget),
+    isEnabled: () => {
+      return tracker.currentWidget
+        ? tracker.currentWidget.context.model.sharedModel.editable
+        : false;
+    },
     icon: intersectionIcon,
     execute: Private.executeOperator('intersection', tracker)
   });
diff --git a/packages/schema/src/interfaces.ts b/packages/schema/src/interfaces.ts
index b676b5c1..0125aeaa 100644
--- a/packages/schema/src/interfaces.ts
+++ b/packages/schema/src/interfaces.ts
@@ -78,6 +78,7 @@ export interface IJupyterCadDoc extends YDocument<IJupyterCadDocChange> {
   objects: Array<IJCadObject>;
   options: JSONObject;
   metadata: JSONObject;
+  readonly editable: boolean;
 
   objectExists(name: string): boolean;
   getObjectByName(name: string): IJCadObject | undefined;
diff --git a/packages/schema/src/model.ts b/packages/schema/src/model.ts
index c5ffd317..2edfe925 100644
--- a/packages/schema/src/model.ts
+++ b/packages/schema/src/model.ts
@@ -26,7 +26,6 @@ import {
   Pointer
 } from './interfaces';
 
-// import { IJCadContent, IJCadModel, IJCadObject, IJCadOptions } from './index';
 export class JupyterCadModel implements IJupyterCadModel {
   constructor(options: JupyterCadModel.IOptions) {
     const { annotationModel, sharedModel } = options;
@@ -428,6 +427,8 @@ export class JupyterCadDoc
     return new JupyterCadDoc();
   }
 
+  editable = true;
+
   private _getObjectAsYMapByName(name: string): Y.Map<any> | undefined {
     for (const obj of this._objects) {
       if (obj.get('name') === name) {
@@ -485,7 +486,6 @@ export class JupyterCadDoc
   );
 }
 
-// TODO Change the IJupyterCadDoc interface to add an "editable" property allowing to make read-only docs?
 export class JupyterCadStepDoc extends JupyterCadDoc {
   constructor() {
     super();
@@ -527,6 +527,8 @@ export class JupyterCadStepDoc extends JupyterCadDoc {
     return new JupyterCadStepDoc();
   }
 
+  editable = false;
+
   private _sourceObserver = (events: Y.YEvent<any>[]): void => {
     const changes: Array<{
       name: string;