The debugger is installed on your system with a debugger resource file
  DECW$SYSTEM_DEFAULTS:VMSDEBUG.DAT that defines the startup default
  settings for the following debugger user-interface options:

   -  Configuration of windows and views

   -  Whether to show or hide line numbers in the source view

   -  Button names and associated debugger commands

   -  Key sequence to display the dialog box for conditional and action
      breakpoints

   -  Key sequence for language-sensitive text selection in the source
      view

   -  Character fonts for text in the windows and views

   -  Key bindings for commands associated with the computer keypad

   -  Colors for elements of the source and instruction views and Editor

   -  Command echo

   -  Title Bar label format

  A listing of the system default debugger resource file with explanatory
  comments is contained in the manual provided with this debugger.

  You can customize the following features from the DECwindows Motif
  interface:

   -  Configuration of windows and views

   -  Whether to show or hide line numbers in the source view

   -  Push button names and associated debugger commands

  You can redefine the rest of the customizable parameters by editing
  your local debugger resource file.

  See Additional Topics for information about changing and saving the
  debugger user-interface options, and restoring system default debugger
  user-interface options.