No, I'm doing ogl stuff and using OpenScreen/ OpenWindowedScreen for on-the-fly switching. Before I go off on a poss wild goose chase I thought I'd check here if these commands specifically clear out the gfx memory. I assumed (wrongly as it turns out) that this would be a quick and easy one for Fred to answer. Unfortunately, for me, Fred appears *very* selective when it comes to answering peoples queries.