Library /sys$common/syshlp/sysmanhelp.hlb DEFINE, /KEY, Description  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    The DEFINE/KEY command assigns a key to a SYSMAN command. This
    enables you to execute the command by pressing the key. You
    can confirm which keys you have defined by using the SHOW KEY
    command.

    When you exit from SYSMAN, any SYSMAN key definitions you
    established will be lost unless you define them in a SYSMAN
    initialization file.