Left/Right pull-down menus
 The Left and Right  menus  allow  you to change settings for
 the left and right panels.

               Left -----+          +------- Right
                         .          .
                   +-- Tree --++-- C:\ --+
                   |          ||         |
                   |          ||         |
                   |          ||         |
                   |          ||         |
                   -----------|----------|
                   +----------++---------+
                   C>_

 The next few help screens describe each item in the Left and
 Right menus.