The debugger has the following user-interface options to accommodate
  different needs and debugging styles:

   -  The debugger has a DECwindows Motif interface for workstations.
      The default DECwindows Motif interface provides the basic debugging
      and convenience features that you will probably need most of the
      time.

   -  The debugger has a command interface for character-cell terminals
      and workstations.  In addition to general-purpose debugging
      features, the command interface provides special features not
      available through the default DECwindows Motif interface.

   -  The DECwindows Motif interface is layered on the command interface
      and has a command-entry prompt (in the command view of the main
      window).  From the DECwindows Motif interface, you can enter
      debugger commands for the following purposes:

       +  As an alternative to using the DECwindows Motif interface for
          certain operations

       +  To do tasks not available through the DECwindows Motif
          interface

   -  You can customize the DECwindows Motif interface with many of the
      special features of the command interface by modifying the push
      buttons in the push-button view (and their associated debugger
      commands) or by adding new push buttons.