Library /sys$common/syshlp/decset$envmgr.hlb cgui, lndlg PopForm, table OptMenu  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Use this radio button to display an option menu containing
    the options system, group, job, the default setting, process,
    or other user defined tables.

    The value indicates the logical name table into which the
    logical name is inserted or from which the logical name is
    deassigned.