If i load a doc into DC on one computer I can see the entire color background as Black. Take that same doc and open it in another computer and all the background is not visible on the screen. Why does one computer show it with the color correctly and the other has a white background, even if I add the background and it shows up on the ad screen, it does not show up on the edit screen. Even when it prints I see the black background. Is this a screen button I am missing.