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

 buffer-name
    Specifies the name of the buffer or buffers whose characteristics
    are to be displayed. If you specify a null buffer name (""),
    the current buffer is assumed. If this parameter is omitted, a
    wildcard buffer name is assumed.