/sys$common/syshlp/helplib.hlb SET, FILE, /RU_ACTIVE, Qualifier, /LOG  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /LOG
       /NOLOG(default)

    Controls whether the SET FILE command displays the file
    specification and the type of facility that has been specified.
    By default, this information is not displayed.