Scale Screen Concepts Back to index... The scale screen is used to scale and move the image in a 5X7 frame. Unlike scaling in the other windows, this scaleing effects the final output image. To show the effects of scaling the app must completely reload and recompute the entire image. This process is quite slow even for the low resolution preview image. So while direct feedback is given it takes so long that it is hard to tell what is happening. To solve this problem the scale screen puts up a control that shows the scaling. The empty yellow box shows the dimensions of the output image while the blue box shows the placement and scaling of the image.