The Viewer pulldown menu provides two options:

     Exit -  This option exits the application.

     Style - This option allows you to change the way you view the entity tree
             in the main window at any time. By default, the Viewer Style is
             Display as Outline.  Options include a column view, a left-oriented
             tree view, or a top-oriented tree view.

1  –  column_viewer_style

     Select Style, Displays as Columns from the Viewer menu to use the
     column style display.  Currently, this style is not much different
     than the Outline style.

2  –  outline_viewer_style

     This is the default Viewer Style.

3  –  Tree viewer style

     When you select Style, Display as Tree from the Viewer pulldown,
     the main window will assume a tree-style display.  You can then switch
     between the left-oriented or top-oriented tree styles by selecting
     Style, Display Left or Style, Display Top from the Viewer pulldown.

3.1  –  tree_navigation

     A tree navigator is available to help you move easily to other parts of
     the tree.  Click on the box in the lower right corner of the main
     display to bring up the tree navigator.  It will show you where you are
     in relation to the rest of the tree.  You can change position in the
     tree by dragging the viewer to the area you wish to view.  To dismiss
     the navigator display, click on the lower right corner of the main
     display again.

     Alternatively, you may use the scroll bars to move through a tree-style
     display.  Whenever you drag a scroll bar, a navigator box will appear to
     indicate where you are in relation to the rest of the tree.