I have been trying to design a screen for years now and I never could complete one because object (buttons, graphics or anythine else) would jump around the screeen changing position for no reason. I tried everything changin video settings and other stuff. Turns out the screen has to be able to be viewed in it's entirety. What I mean was my monitor was set to 1024x768 and so was the mach screen, since the Screen4's program borders would make not all of the layout of mach viewable without using scroll bars it would get confused about actual pixel screen position. Needless to say all I did was increase my monitor resolution so the entire thing could be see and low and behold no more problem. I finally got a screen exactly the way I want it. Hope this helps someone else.