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

       /DISPLAY=display-name

    Specifies the name of the display on which to create the terminal
    window. If this parameter is omitted, the DECW$DISPLAY logical
    name is used.