Library /sys$common/syshlp/tff$tfuhelp.hlb Commands, SHOW, TERMINAL/FALLBACK, Parameter  *Conan The Librarian (sorry for the slow response - running on an old VAX)

   terminal-name

   Indicates  the  target  terminal for the show operation. If excluded
   your own terminal is used. Note that you can only use TFF from local
   terminals;  you  cannot  use  terminal fallback on a remote terminal
   (RTAx),  the  fallback  terminal  device  (FBA0),  a  Packet  Switch
   Interface (PSI) terminal (NVA0), a disconnected virtual terminal, or
   a terminal set for dynamic switching (DYNSWITCH) with DECnet.