Another frustrated Sketchup user. I recently tried creating CONTOURS for the first time, but neglected to expand the elevations BEFORE creating the contours. Unfortunately I didn’t create a separate layer for the contours so I “baked-in” the contours and saved my work before retiring for the evening. Now I am unable to UNDO the contours, expand the elevations in my landscape and then create Contours properly. I can click on separate parts of my landscape and it seems as though I should be able to expand these sections, but the Push/Pull tool won’t work. I get the banner “Cannot Push/Pull Smooth Surfaces” PLEASE, can anyone tell me how to UNDO CONTOURS?