i have a building that has some areas on the upper floors the bump out and have windows in them. The footprint is essentially identical except for these areas, other than that all of the windows are the same and stack straight up and down. In order to accurately model this building is there any way to copy the floors up then edit the footprint in the areas required without losing all of the windows and having to re-enter each and every one of them at each floor? this is extremely frustrating.... thanks!