PEEK and SPY have a "screen-saver" feature that may be used to allow
   the watcher to see the initial contents of a user's screen when watching
   begins.

   Since VMS does NOT store the screen contents, and since the VMS terminal
   driver just "throws away" output buffers when its done with them,
   normally there is no way to see what is currently on a user's screen
   when one first begins watching.

   Peek/Spy could, however, be used to take control of the user's screen
   and keyboard, and then enter a refresh-screen sequence to the active
   program to tell it to redisplay the screen's current contents.

   The drawback with this approach is that there are many VMS programs
   (including DCL and many home-grown menu systems) which do NOT have
   any screen-refresh command programmed into them, so this technique
   doesn't ALWAYS work.

   Thus for version 2.0 and upward of Peek/Spy we have added the capability
   of saving the screen contents for selected users on your system so one
   gets a full intial-screen display when one starts watching the user.

   The way this is done differs for the VAX and the ALPHA.