Kieth Nissen

When I create a window symbol to use in an upper wall over other lower windows the upper window does not consistently render as transparent. Sometimes it works and sometimes it doesn't. I can't see what the difference is.

I have at least one corrupted file; it was converted from Minicad and has actually been through more than one Minicad update. Symptoms are disappearing and immovable symbols (in one instance the symbols in walls turned grey and I could not delete or move them). It's a big file and I hate to start over. Kieth Nissen