      *  in the <code>navigationGroup</code> skin part. 
      *
      *  <p>The location and appearance of the <code>navigationGroup</code> 
-     *  skin part is determined by the skin.
+     *  skin part is determined by the ActionBarSkin class.
      *  The default ActionBarSkin class defines the <code>navigationGroup</code>
      *  to appear to the left of the <code>titleGroup</code> area of the ActionBar.</p>
      * 
-     *  <p>Create a custom skin to change the default location and appearance of
-     *  the <code>navigationGroup</code> skin part.</p>
+     *  <p>Create a custom ActionBarSkin skin class to change the default location 
+     *  and appearance of the <code>navigationGroup</code> skin part.</p>
      *  
      *  @default null
      *

     *  skin part of the ActionBar control.
     *
     *  <p>The location and appearance of the <code>titleGroup</code> 
     *  skin part is determined by the skin.
     *  The default ActionBarSkin class defines the <code>titleGroup</code>
     *  to appear in the center of the ActionBar,
     *  using the space remaining between <code>navigationGroup</code> 

     *  <code>titleDisplay</code> skin part, if present, is displayed 
     *  in place of the <code>titleGroup</code> skin part.</p> 
     * 
     *  <p>Create a custom ActionBarSkin skin class to change the default 
     *  location and appearance of the <code>titleGroup</code> skin part.</p>
     *  
     *  @default null
     *
