diff --git a/src/editor/ui/UI.js b/src/editor/ui/UI.js
index bb08f38..a772cb3 100644
--- a/src/editor/ui/UI.js
+++ b/src/editor/ui/UI.js
@@ -20,7 +20,7 @@ import Paint from '../../painteditor/Paint';
 import Events from '../../utils/Events';
 import Localization from '../../utils/Localization';
 import ScratchAudio from '../../utils/ScratchAudio';
-import {frame, gn, CSSTransition, localx, newHTML, scaleMultiplier, getIdFor, isTablet, newDiv,
+import {frame, gn, CSSTransition, localx, newHTML, scaleMultiplier, fullscreenScaleMultiplier, getIdFor, isTablet, newDiv,
     newTextInput, isAndroid, getDocumentWidth, getDocumentHeight, setProps, globalx} from '../../utils/lib';
 
 let projectNameTextInput = null;
@@ -809,7 +809,7 @@ export default class UI {
             gn(list[i]).className = gn(list[i]).className + ' presentationmode';
             frame.appendChild(gn(list[i]));
         }
-        var scale = Math.min((w - (136 * scaleMultiplier)) / gn('stage').owner.width, h / gn('stage').owner.height);
+        var scale = Math.min((w - (fullscreenScaleMultiplier * scaleMultiplier)) / gn('stage').owner.width, h / gn('stage').owner.height);
         var dx = Math.floor((w - (gn('stage').owner.width * scale)) / 2);
         var dy = Math.floor((h - (gn('stage').owner.height * scale)) / 2);
 
diff --git a/src/utils/lib.js b/src/utils/lib.js
index d39f585..99d5673 100755
--- a/src/utils/lib.js
+++ b/src/utils/lib.js
@@ -6,6 +6,7 @@ export const DEGTOR = Math.PI / 180;
 export const WINDOW_INNER_HEIGHT = window.innerHeight;
 export const WINDOW_INNER_WIDTH = window.innerWidth;
 export const scaleMultiplier = WINDOW_INNER_HEIGHT / 768.0;
+export const fullscreenScaleMultiplier = 136;
 
 export const isiOS = (typeof AndroidInterface == 'undefined');
 export const isAndroid = (typeof AndroidInterface != 'undefined');