I am using Data CAD 20 LT and have been working with creating voids in hatching in 2D. So far, I have had no problem creating rectangular/circular-shaped voids from the polyline menu, but how do I create ellipse-shaped voids or other shaped voids for that matter? I appreciate any light that can be shed on this question...
An ellipse you can turn on the Knock Out setting to make that work. Can also do that to circles.
If you have a set a lines/arcs/curves, you should be able to go to the polyline edit menu, and select the S3 Line to Poly command, and join any set of connected entities into a polyline which then can become a void.