What can I do to make the result in a drawing program more visable?

I am trying to use a table based plan drawing software program (PolyDraw) to make some craft patterns. When the DRAW selection is made the exterior circle is lightly shown and the interior circles are very difficult to see. I printed one pattern and the outer and inner circles show up well. I tried SYSTEM PREFERENCES > SYSTEM > UNIVERSAL ACCESS > DISPLAY > Enhance Contrast to try to improve the monitor display of the drawing : no apparent improvement.

The browser I am using is Safari.