for some reason, the "3dxy" with x,y coordinates of 0,0 does not prevent the panel from scrolling downward. If I enter a -100 in the why coordinate, the panel will scroll and stop at this point. At 0,0, the panel scrolls all the way down. Why? I am working with an image(isiz) size of 1600 x 1300 and a 3d window(3dsz) size of 1600 x 1300. tony

Never mind. I got it.tony