Library /sys$common/syshlp/lse$help.hlb SET_PROMPT_ALTERMINATOR  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  Syntax:  SET PROMPT ALTERMINATOR user_key_name add_remove

  Defines keys for terminating a prompt that are executed in only in
  the current buffer.

  The default key binding is KP4, KP5.  Simple terminator keys are not
  executed but signal the end of a prompt.

  RELATED COMMANDS:

     SET PROMPT commands