	SET GRAPH WINDOW

a  Autoscale x and y axes
b  Set bottom edge of window
c  Center window at cursor position
d  Shift window down
e  Expand window (mark lower left and upper right of new window)
f  Flip x axis
g  Flip y axis
j  Set left edge of window
k  Set right edge of window
l  Shift window left
m  Autoscale x axis
n  Autoscale y axis
p  Pan x and y axes about cursor
r  Shift window right
t  Set top edge of window
u  Shift window up
x  Zoom x axis about cursor
y  Zoom y axis about cursor
z  Zoom x and y axes about cursor
