anchor.diff:  
     @override
     void onEnter() {
  +    enableKeyboard = true;
       super.onEnter();
   //    if (!centered) {
   //      setPosition(0.0, 300.0);
  
positive.code:     Ranger.Application app = Ranger.Application.instance;
      //print("app.viewPortWindowAABB: ${app.viewPortWindowAABB}");
  
      gTypeSheet = new Ranger.SpriteSheetImage("resources/gtype.json");
      gTypeSheet.load(spriteLoaded);
      
      //---------------------------------------------------------------
      // Basic grid
  
negative.code:     zoomText.text = zValue.toStringAsFixed(2);
      
      Ranger.GroupingBehavior sceneGB = sm.runningScene as Ranger.GroupingBehavior;
      Ranger.BaseNode layer = sceneGB.getChildByTag(2525);
      if (layer != null) {
        layer.uniformScale = zValue;
      }
  