The debugger has a DECwindows Motif interface for workstations.
    When using this interface, you interact with the debugger by
    using a mouse and pointer to choose items from menus, click
    on buttons, select names in windows, and so on. The default
    DECwindows interface provides the basic debugging and convenience
    features that you will need most of the time.

    You can customize the DECwindows Motif interface with many of
    the special features of the command interface by modifying the
    control-panel buttons and their associated commands or by adding
    new buttons. You can customize other DECwindows Motif interface
    features by modifying the debugger resource file (DECW$USER_
    DEFAULTS:VMSDEBUG.DAT).

    Occasionally, you may find you prefer to disable the DECwindows
    interface, in order to use the somewhat faster command-line
    interface. If you redefine the DBG$DECW$DISPLAY logical name,
    as follows, you can use the debugger command-line interface while
    retaining a windows interface for your application:

    $ DEFINE DBG$DECW$DISPLAY " "

    For complete information about the DECwindows Motif interface,
    see the debugger's DECwindows Motif documentation.

1  –  Invocation

    To invoke the debugger's DECwindows Motif interface from the DCL
    command line, issue the following command:

    $    DEBUG/KEEP

2  –  Online Help

    To access online help within the DECwindows Motif interface,
    choose one of the following items from the Help menu on the
    debugger's main window:

    o  On Context: context-sensitive help.

    o  On Window: task-oriented help.

    o  On Help: how to use online help.

    o  On Version: copyright and version information.

    o  On Commands: debugger command help.

    o  On Commands, Messages item: diagnostic message help.

3  –  DBG$DECW$DISPLAY Logical Name

    Specifies the debugger interface (DECwindows Motif or command)
    or the display device (if you are displaying the interface on a
    workstation).

    By default, DBG$DECW$DISPLAY is either undefined or has the same
    definition as the application-wide logical name DECW$DISPLAY (see
    help on Logical_Names).

    The DECwindows Motif interface is the default on workstations.
    To display the command interface instead of the DECwindows Motif
    interface, enter the following definition before starting the
    debugger:

    $ DEFINE DBG$DECW$DISPLAY " "

    For complete information about the DECwindows Motif interface,
    see the debugger's DECwindows Motif documentation.