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

       /READSYNC
       /NOREADSYNC

    Sets or clears the READSYNC terminal characteristic in the
    created terminal window. The default is to inherit the
    characteristic from the parent.