         //
         //--------------------------------------------------------------------------
         public var hostComponent:ViewNavigator;
+        
+        // Groups and UIControls
         public var contentGroup:Group;
         public var actionBar:ActionBar;
         public var tabBar:ButtonBar;
+        
+        // Transitions
+        public var defaultPushTransition:IViewTransition;
+        public var defaultPopTransition:IViewTransition;
         
         //--------------------------------------------------------------------------
         //

    import spark.components.ButtonBar;
    import spark.components.Group;
    import spark.components.ViewNavigator;
    
    public class ViewNavigatorSkin extends SliderSkin
    {

            addChild(tabBar);
            
            tabBar.dataProvider = hostComponent;
            
            defaultPushTransition = new SlideViewTransition(300, SlideViewTransition.SLIDE_LEFT);
            defaultPopTransition = new SlideViewTransition(300, SlideViewTransition.SLIDE_RIGHT);
        }
        
        /**
