anchor.diff:      orangeCircle.setPosition(640.0, 400.0);
       orangeCircle.color = Ranger.Color3IOrange;
       orangeCircle.uniformScale = 10.0;
  -    addChild(orangeCircle, 100, 109);
  +    _zoomControl.addChild(orangeCircle, 100, 109);
   
       //---------------------------------------------------------------
       // A node to view the world AABBox of a selected node.
  
positive.code:     worldAABB.isSelectable = false;
      worldAABB.visible = false;
      worldAABB.uniformScale = 1.0;
      addChild(worldAABB, 10, 1020);
  
      //---------------------------------------------------------------
      // Paricle system
      //---------------------------------------------------------------
      Ranger.ParticleSystemVisual visual = ps.emitterVisual;
      visual.size = 25.0;
      addChild(visual, 200, 5001);
  
      app.scheduler.scheduleTimingTarget(ps);
      
  
negative.code:     // A container for the basicBox node and aabox node.
      //---------------------------------------------------------------
      AABBContainerNode container = new AABBContainerNode.withLead(basicBox);
      _zoomControl.addChild(container, 10, 106);
  
  
      //---------------------------------------------------------------
  