Screen size

["John A. Condon", BDB]

Hello users!

     Do any of you know how to reset the screen size of your
graphics monitor?  I believe the command is "viewport" but
where is the program that it's in?  What I want to do is 
show my graphics from the high resolution monitor (60 Hz)
on a RS 170 NTSC video monitor.  What happens now is that
portions of the graphics are "cut-off" when I display them
on the smaller-sized video screen.   ........help!!

                 - John (alias, ..the Jersey Renegade)