The Edit Options File in the Options menu of the source view loads and
  displays the local debugger resource file
  DECW$USER_DEFAULTS:VMSDEBUG.DAT in the Debug Editor for review and
  modification.  If there is no local debugger resource file, the Debug
  Editor buffer is empty.

  To create a local debugger resource file, exit the Debug Editor and
  select Save Options or Restore Default Options from the Options menu of
  the source view.

  You must exit and restart the debugger to invoke the default
  definitions in the edited debugger resource file.