I had a problem where the document window was located high up at the left edge of my monitor. It was so high, that the document title was off the screen. Since the document wondow is moved by dragging it's title around, I couldn't move the window back to center screen. I found the solution in an old FAQ file. The solution was - Type "PP2" Screen reverts to Poser 2 layout. Type "PP3" Screen reverts to Poser 4 layout with document window centered. I don't know if this would work with your problem, but if your problem returns, give it a try.