/CHAT_TOGGLE = "hot-key-defintion"

   Allows the watcher and user to chat, where they can type back and
   forth to each other, but the keystrokes typed are not entered as
   input to whatever program the user process currently is running.

   Specify a hot-key sequence which, when pressed while being watched,
   will cause Peek/Spy to enter/exit a mode which is similar to "local
   mode" on a standard terminal.

   The default hot-key value for ALLOW/CHAT_TOGGLE is taken from the
   logical USER$CHAT_TOGGLE, usually defined system-wide by
   PEEK_DEFAULTS.COM.

   While in chat mode, what the user and watcher type to each other is
   echoed on both terminals, but will NOT be placed into the user's
   typeahead buffer, or passed on to the user's running program. This
   prevents this type of chatting activity from causing program or
   command errors for the user being watched.

   Example:

         $ PEEK/ALLOW JONES /CHAT="<F14>"

   The above command allows user JONES to watch you with PEEK and
   defines F14 as the hot-key for entering and exiting chat mode.

   Whenever the user being watched presses F14, both terminals will go
   into chat mode until F14 is pressed again.

   While in chat mode, the watcher and user being watched may type
   whatever they wish, and it will be displayed on both screens.

   If chat mode appears not to work and your terminal just beeps when
   you type, this is because you do not have keyboard input control
   (see the PEEK Commands ALLOW Subtopic: /TOGGLE_INPUT, which is still
   active during chat mode unless /SIMULTANEOUS_INPUT is in effect).

   The keys which are useful while in chat mode are the alphanumeric
   keys, carriage-return, delete and the arrow keys.

   You should press carriage-return to end a line, since if the other
   terminal is not in auto-wrap mode, the other user may not be able
   to see what you are typing after you reach the margin and only your
   terminal does an autowrap.