I've checked the Display Options numerous times and turned every option "on" to no avail. Additionally, the project "Floor Plan" does not show any drywall where it once did; there's only a gap or space where the drywall was. I've loaded a few back-up floor plans of the same project and have no problems and I've compared details of both plans but can't see any difference. I was looking for an easy fix but might have to use the latest back-up.