Library /sys$common/syshlp/sysmanhelp.hlb ALF, SHOW, Qualifiers, /OUTPUT  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /OUTPUT[=filespec]

    Directs the output of the command to a file. If you do not
    include a file specification with this qualifier, SYSMAN writes
    the output to the file SYSMAN.LIS in your default directory.