Library /sys$common/syshlp/dbg$help.hlb DEBUG, Messages, NOPROMPT  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 cannot delete, remove, unselect, or change kind of the display_name
 display

    Facility: DEBUG, VMS Debugger

    Explanation: This display can not be deleted, removed,
    unselected, or have it's kind changed.

    User Action: None.