I have taken poster board (or extra cereal boxes) and made temples of various size circles and half circles so can easily see what size I'd like on a lo just by grabbing the template and laying it on the page. I also have made templates of all sizes of photos (5x7, 4x6, 4x4, 2x2, 3x5, etc.) that I might use on a lo. I can quickly pull the templates and determine what will work prior to cutting my photos.