As a former semi-pro AutoCAD user, i've been running through John Pickup's Essential and Architecture tutorials. Until now things have looked as his books show. The segment i'm in is doors and windows. I've run through it step by step, but the neither the doors or the windows are showing up in any other views, only in plan. In the isometric view i can select the door and window so i know its placement is correct and i've check for overlapping walls. What is this novice missing?