/sys$common/syshlp/helplib.hlb SET, TERMINAL, Qualifiers, /ADVANCED_VIDEO  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /ADVANCED_VIDEO
       /NOADVANCED_VIDEO

    Controls whether the terminal has advanced video attributes and
    is capable of 132-column video. If the terminal width is set
    to 132 columns and you specify the /ADVANCED_VIDEO qualifier,
    the terminal page limit is set to 24 lines. If you specify the
    /NOADVANCED_VIDEO qualifier, the terminal page limit is set to
    14 lines.