Many thanks for the quick replies, it worked like a charm, I had been fighting this problem for a while. I'm sure I will have other issues to deal with, as I learn more, but I will be looking for the answers here. I did take a quick look at the Aidan Chopra Tutorials on You Tube & they look very helpful, I guess I'll have to break down and buy the Dummies book too.

I'm drawing a cabinet, which has 3 shelves in it. When I close in the geometry to create the shelves, it also creates a face on the back of the cabinet between the shelves, which blocks the view into the cabinet, is there away I can erase the face. I am fairly new at this, but as a toolmaker, I do have experience with 3D drawing and programming, and am having a great time with this software. Thanks for your help