p>Each of these commands creates a graphics file containing a picture
of the current lens system with marginal rays traced from on-axis and
at the limits of the field of view as specified by the SCY and SCX
values stored in the lens database. To see the pictures, just
type:</p>

<p><strong>DRAW</strong></p>

<p>To clear the screen, just press ENTER. If you want a hard copy,
either do a graphics screen dump or use the <strong>GRAOUT</strong>
command described in the GRAPHICS section of the reference
manual. 