Thanks. I was afraid that might be the answer. I got up very early this morning, saved several hours of rendering and, when I got up an hour and a half later, I attempted to save that hour and a half; that's when I boo-booed. So, fortunately, not much lost. About the buttons. It seemed like saving POV would be their purpose. The weird thing, though, is that, upon clicking a button, it goes to some other, bizarre POV, not the one I'm on. Then I can never figure out how to get back. Weird, very weird. I appreciate your reply. I guess I may have to do some down-home experimenting.