Thank you so much for the quick response, David! I did follow your first suggestion and unchecked "Ceiling over this room" for my "First Floor" (where all my original walls were built), as well as a "Floor 0" that is listed also. But, the appearance hasn't changed. Because I am adjusting default settings, do I need to rebuild the walls (not a huge effort)? Note that on the main window, I see the level arrows which also show an "A" layer referencing an attic. I did not intentionally create that. Thx much!!! - Bob