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

       /TTSYNC
       /NOTTSYNC

    Sets or clears the TTSYNC terminal characteristic in the created
    terminal window; the default is to inherit the characteristic of
    the parent.