AXP-Only...

   It is possible on AXP to watch an RTA which has not done a
   PEEK/SAVE_SCREEN. This is accomplished by using the earlier,
   version-4.4 RTA feature.

   This feature is invoked for watching an unconverted RTA by using
   the /AXPRTA_WATCHONLY qualifier (or making /AXPRTA_WATCHONLY
   the default in PEEK_DEFAULTS.COM, or one of the default logical-
   name tables defined by PEEK_DEFAULTS.COM).

   You must first also enable use of this feature in PEEK_DEFAULTS.COM
   by setting ALLOW_EARLIER_AXP_RTA_INTERFACE to TRUE. (See the warnings
   in PEEK_DEFAULTS.COM before enabling this feature.)

   When using this EARLIER_AXP_RTA_INTERFACE, you will not get an
   initial-screen display.

   With this EARLIER_AXP_RTA_INTERFACE you can only watch the RTA, you
   cannot take over the keyboard. Bypass-output, chat-mode, etc, also
   do not work when watching RTAs with the EARLIER_AXP_RTA_INTERFACE.

   Because of the interface used by the EARLIER_AXP_RTA_INTERFACE, you
   will not see input characters typed by the user being watched until he
   completes his input with a carriage return or other input terminator.

   The tracking of the victim's screen is not always perfect with this
   EARLIER_AXP_RTA_INTERFACE. In particular, when the victim interrupts
   output with Ctrl-Y, the watcher's screen is liable have a somewhat
   different amount of interrupted output displayed than the victim's did.

   The watcher may also sometimes get more or less linefeed characters
   displayed than the victim, especially on broadcast messages.

   Because of the interface used by the EARLIER_AXP_RTA_INTERFACE, the
   victim's End-Watch hot-key must be a function-key, keypad-key or
   escape sequence. Control characters other than Escape (such as Ctrl-P)
   are not recognized for an RTA victim when that victim is being watched
   with the EARLIER_AXP_RTA_INTERFACE (the VMS RTA interface filters out
   control characters on the remote system before Peek/Spy gets to see them.)