The Pixiss Proportional Scale Divider tool can be used to transfer subject matter onto your canvas or paper while keeping the proportions. Easy to use. Increase, decrease or measure the size of a subject to draw. The Pixiss Artist's View Catcher (often called a view finder or viewfinder) allows you to look at a scene or object in twelve sections to modify or draw with correct proportions. 5x3". Determine color values and intensities with the Pixiss grey scale & value finder. This artist viewfinder is 5x3" size.