diff --git a/modules/scene/sceneSetup.ts b/modules/scene/sceneSetup.ts
index 5653169b..9eb8a410 100644
--- a/modules/scene/sceneSetup.ts
+++ b/modules/scene/sceneSetup.ts
@@ -14,6 +14,7 @@ import {
   Matrix4, Raycaster, Box3
 } from "three";
 import {TransformControls} from "three/examples/jsm/controls/TransformControls";
+import {stream} from "lstream";
 
 export default class SceneSetUp {
   workingSphere: number;
@@ -31,6 +32,7 @@ export default class SceneSetUp {
   trackballControls: CADTrackballControls;
   transformControls: TransformControls;
   updateControlsAndHelpers: () => void;
+  viewportSizeUpdate$ = stream();
   
   constructor(container, onRendered) {
     
@@ -93,6 +95,7 @@ export default class SceneSetUp {
       this.updatePerspectiveCameraViewport();
       this.updateOrthographicCameraViewport();
       this.renderer.setSize( this.container.clientWidth, this.container.clientHeight );
+      this.viewportSizeUpdate$.next();
       this.render();
     }
   }
diff --git a/web/app/cad/sketch/inPlaceSketcher.js b/web/app/cad/sketch/inPlaceSketcher.js
index 1ad814c1..1f5aa8f3 100644
--- a/web/app/cad/sketch/inPlaceSketcher.js
+++ b/web/app/cad/sketch/inPlaceSketcher.js
@@ -6,6 +6,7 @@ import {createEssentialAppContext} from "sketcher/sketcherContext";
 import {ORIGIN} from "math/vector";
 import {lookAtFace} from "cad/actions/usabilityActions";
 import {Styles} from "sketcher/styles";
+import {createFunctionList} from "gems/func";
 
 export class InPlaceSketcher {
   
@@ -35,6 +36,8 @@ export class InPlaceSketcher {
     let container = viewer3d.sceneSetup.container;
     let canvas = document.createElement('canvas');
     canvas.style.position = 'absolute';
+    canvas.style.left = 0;
+    canvas.style.top = 0;
     canvas.style.right = 0;
     canvas.style.bottom = 0;
 
@@ -53,6 +56,11 @@ export class InPlaceSketcher {
     this.viewer.io.loadSketch(sketchData);
     this.ctx.streams.sketcher.sketchingFace.next(face);
     this.ctx.streams.sketcher.sketcherAppContext.next(this.sketcherAppContext);
+
+    this.disposers = createFunctionList();
+    this.disposers.add(
+      this.ctx.viewer.sceneSetup.viewportSizeUpdate$.attach(this.onCameraChange)
+    );
   }
 
   get sketchStorageKey() {
@@ -72,6 +80,7 @@ export class InPlaceSketcher {
     this.ctx.streams.sketcher.sketchingFace.next(null);
     this.ctx.streams.sketcher.sketcherAppContext.next(null);
     this.ctx.workbenchService.switchToDefaultWorkbench();
+    this.disposers.call();
     viewer3d.requestRender();
   }