Thanks Eric for both the tip on signature and for the answer to my question. Indeed I was using the floor camera. I had not actually reviewed the differences between the cameras. Now I understand that the floor camera doesn't show anything above the ceiling. Much appreciated!
I am trying to learn how to work with roofs and specifically a cathedral roof. When I create a very simple 1 room design and uncheck the ceiling over room box in the room specification dialog, the roof is cathedral but in 3d view the attic walls above the gable walls doesn't show. Instead I see the blue sky outside the design. How do I get the attic walls to appear in 3d view?