diff --git a/Canvas.js b/Canvas.js
index 65d8aff93..6272170dc 100644
--- a/Canvas.js
+++ b/Canvas.js
@@ -226,35 +226,40 @@ function newCanvas() {
                 case 113: { //  F2
                     browserCanvas.width = 400 * 3
                     browserCanvas.height = 580 * 3
-                    centerCanvar()
+                    centerCanvas()
+                    DISABLE_BROWSER_RESIZE_EVENT = true
                     return
                     break
                 }
                 case 114: { //  F2
                     browserCanvas.width = 400 * 2
                     browserCanvas.height = 580 * 2
-                    centerCanvar()
+                    centerCanvas()
+                    DISABLE_BROWSER_RESIZE_EVENT = true
                     return
                     break
                 }
                 case 115: { //  F3
                     browserCanvas.width = 400 * 1.5
                     browserCanvas.height = 580 * 1.5
-                    centerCanvar()
+                    centerCanvas()
+                    DISABLE_BROWSER_RESIZE_EVENT = true
                     return
                     break
                 }
                 case 116: { //  F5
                     browserCanvas.width = 400 * 1
                     browserCanvas.height = 580 * 1
-                    centerCanvar()
+                    centerCanvas()
+                    DISABLE_BROWSER_RESIZE_EVENT = true
                     return
                     break
                 }
                 case 117: { //  F6
                     browserCanvas.width = window.innerWidth
                     browserCanvas.height = window.innerHeight - CURRENT_TOP_MARGIN
-                    centerCanvar()
+                    centerCanvas()
+                    DISABLE_BROWSER_RESIZE_EVENT = false
                     return
                     break
                 }
@@ -292,7 +297,8 @@ function newCanvas() {
             }
         }
 
-        function centerCanvar() {
+        function centerCanvas() {
+            return
             let top = (window.innerHeight - browserCanvas.height) / 2
             let left = (window.innerWidth - browserCanvas.width) / 2
             browserCanvas.style = "position:absolute; top:"+ top + "px; left:"+ left + "px; z-index:1"
diff --git a/Globals.js b/Globals.js
index 1d33cfb9b..35a75f364 100644
--- a/Globals.js
+++ b/Globals.js
@@ -48,6 +48,8 @@ const ZOOM_OUT_THRESHOLD_FOR_DISPLAYING_SCALES = 3
 let FONT_ASPECT_RATIO = 0.32;
 let ANIMATION_FRAME_PER_SECONDS
 
+let DISABLE_BROWSER_RESIZE_EVENT = false
+
 const GET_CONTAINER_PURPOSE = {
     MOUSE_OVER: 1,
     MOUSE_WHEEL: 2,