VT100: EXT + *              VT200: EXT + F12
    DEFINE_KEY Function: DUP

    Lets you enter a value in the same field in several forms without
    needing to repeat the entry for each form.

    After entering the data in the field on the first form, use the
    DUP function when at the same field on succeeding forms. The
    application program makes the necessary translation, filling in
    these fields with the same value. For details about the use of
    this key, refer to the user's guide of the particular application
    program.

    Displays an asterisk (*).