Syntax:  SET PROMPT EXPANDMENU prompt_keypad

  Specifies the available key bindings for the expand menu prompt.

  This command allows you to specify which set of key bindings you want
  available at the expand menu prompt:  VMSLSE style key bindings
  (compatible with LSE Version 3.1), the default editing (standard EDT
  or EVE) key bindings, or user customized key bindings as used in your
  regular editing buffers.

  RELATED COMMANDS:

     SET PROMPT commands         SHOW PROMPT ATTRIBUTES