Small idea, but could be a big timesaver, especially when assigning materials to wall/roof/floor/ceiling layers. When assigning a specific material to a specific element structure layer, a "Close All" or "OK All" option, would save at least 4 mouse clicks to 1. OK to close the material browser 2. OK to close the wall/floor/roof/ceiling assembly window 3. Apply the change to the wall/floor/roof/ceiling type 4. OK to close the wall/floor/roof/ceiling type properties