I'm new to the program and was going along nicely. Imported my plan view into the 2D pane and did the walls. 3D view pane showed the walls very nicely. Then I got into a muddle with doors and door frames and when I got straightened out (I think), I found the image in the 3D pane had disappeared. Can anyone help me find what happened so I can get it back? Is there an off/on switch for the 3D pane?