/sys$common/syshlp/helplib.hlb DTM, SHOW, BENCHMARK_DIRECTORY, Example  *Conan The Librarian (sorry for the slow response - running on an old VAX)

   DTM> SHOW BENCHMARK_DIRECTORY
     DUA0:[USER01.BMK]       "Default benchmark library"
   DTM>

   This command displays the directory specification for the
   current default benchmark directory.