[Tutor] What command or sequence of commands to I need to use ... please see inside for description

[Dirigo]

What command or sequence of command keys do I need to get back from a
full screen condition to a smaller Python command window?

When I first open up the Python command window it is of usuable size,
but there are times when I like to expand it to full screen by selecting
the Full Screen Icon option in its menu bar.  Works great, but when I'm
done I seem to have problems getting the full screen to go back to the
"normal" sized Python command window that opened up initially.  It
either seems to lock up my system (not totally sure of that) or I have a
nice black screen with nothing on it.  Exit, quit, etc don't seem to
work.  Would it per chance be the Control-Z and Return sequence?

Obviously, it might be something wrong with my system too, but am
interesting in hearing how you folks flip-flop between small and full
screen displays of the Python command window.  PEBCAK time?  (Problem
Exists Between Chair And Keyboard ;>))

Thanks in advance,

Dirigo