I have a part that has some keep-out areas on the surface that are represented as sketches. No features.

When I make the drawing, I want to be able to fill in the keep-out areas with crosshatching. I can see the sketch lines on the drawing but, they aren't recognized as boundaries. When I try to use the crosshatching tool, it covers the entire surface.

I could just make the sketches on the drawing itself but, I think it makes sense to have them on the solid model. How do I get this to work?

Thanks in advance for your time.