= Termination

        {END | RETurn | QUIt | EXIt | CANcel}   [-NB|-BK]

            EXI   :terminate current screen hierarchy(half of split)
            RET   :return to command prompt(Update is saved)
            QUI   :return to command prompt(Update is abandoned)
            END   :terminate current screen(Update is saved)
            CAN   :terminate current screen(Update is abondaned)

            -NB   :(END cmd only)skip temporary backup at file save.
                   To protect from file corruption by ABEND at file write,
                   original file(local file except on floppy drive only) is copied
                   on the directory just before writeback,then deleted after
                   write completed. Specify NB if you worry about disk space
                   or performance.
            -BK   :(END cmd only)deny NB option of Edit cmd.