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

    Indicates how much information you want displayed. The /BRIEF
    qualifier causes LSE to display (in tabular format) the name and
    associated buffer for each marker currently set.

    If you specify a wildcard expression for the parameter, or if LSE
    assumes one, /BRIEF is the default.