diff --git a/dotscape b/dotscape
index f72227f..400f36c 100755
Binary files a/dotscape and b/dotscape differ
diff --git a/fcore/common-update.sml b/fcore/common-update.sml
index c35440b..bae17ac 100644
--- a/fcore/common-update.sml
+++ b/fcore/common-update.sml
@@ -7,6 +7,43 @@ struct
   open InputMessage
   open UpdateMessage
 
+  fun resizeWindow (model, width, height, dots) =
+    let
+      val
+        { squares
+        , canvasWidth
+        , canvasHeight
+        , showGraph
+        , arrowX
+        , arrowY
+        , xClickPoints
+        , yClickPoints
+        , ...
+        } = model
+      val maxSide = Int.max (canvasWidth, canvasHeight)
+
+      val squares = CollisionTree.toTriangles
+        ( width
+        , height
+        , squares
+        , maxSide
+        , canvasWidth
+        , canvasHeight
+        , xClickPoints
+        , yClickPoints
+        )
+
+      val graphLines =
+        if showGraph then GraphLines.generate model else Vector.fromList []
+
+      val drawMsg =
+        RESIZE_SQUARES_DOTS_AND_GRAPH
+          {squares = squares, graphLines = graphLines, dots = dots}
+      val drawMsg = [DRAW drawMsg]
+    in
+      (model, drawMsg)
+    end
+
   fun getSaveSquaresMsg (model: app_type) =
     let
       val {canvasWidth, canvasHeight, squares, ...} = model
diff --git a/fcore/move-mode.sml b/fcore/move-mode.sml
index de25963..ed7eae9 100644
--- a/fcore/move-mode.sml
+++ b/fcore/move-mode.sml
@@ -5,7 +5,13 @@ struct
   open DrawMessage
   open UpdateMessage
 
-  (* todo: resize message *)
+  fun resizeWindow (model, width, height) =
+    let
+      val model = AppWith.windowResize (model, width, height)
+      val dots = Vector.fromList []
+    in
+      CommonUpdate.resizeWindow (model, width, height, dots)
+    end
 
   fun getDrawMsg (model: app_type) =
     let
@@ -123,5 +129,6 @@ struct
     | ARROW_LEFT => moveImageLeft model
     | ARROW_RIGHT => moveImageRight model
     | KEY_ESC => enterNormalMode model
+    | RESIZE_WINDOW {width, height} => resizeWindow (model, width, height)
     | _ => (model, [])
 end
diff --git a/fcore/normal-mode.sml b/fcore/normal-mode.sml
index 6112332..836e18a 100644
--- a/fcore/normal-mode.sml
+++ b/fcore/normal-mode.sml
@@ -194,42 +194,10 @@ struct
   fun resizeWindow (model, width, height) =
     let
       val model = AppWith.windowResize (model, width, height)
-
-      val
-        { squares
-        , canvasWidth
-        , canvasHeight
-        , showGraph
-        , arrowX
-        , arrowY
-        , xClickPoints
-        , yClickPoints
-        , ...
-        } = model
-      val maxSide = Int.max (canvasWidth, canvasHeight)
-
-      val squares = CollisionTree.toTriangles
-        ( width
-        , height
-        , squares
-        , maxSide
-        , canvasWidth
-        , canvasHeight
-        , xClickPoints
-        , yClickPoints
-        )
-
-      val graphLines =
-        if showGraph then GraphLines.generate model else Vector.fromList []
-
+      val {arrowX, arrowY, ...} = model
       val dots = getDotVecFromIndices (model, arrowX, arrowY)
-
-      val drawMsg =
-        RESIZE_SQUARES_DOTS_AND_GRAPH
-          {squares = squares, graphLines = graphLines, dots = dots}
-      val drawMsg = [DRAW drawMsg]
     in
-      (model, drawMsg)
+      CommonUpdate.resizeWindow (model, width, height, dots)
     end
 
   fun undoAction model = (model, [])