Sounds easy, right? Just choose 4x6, or 8x10, or whatever size your paper is, then print away. Problem is, though they're both rectangles, they have different aspect ratios--and that simply means that your photos may not print out the way you expect them to. If the thought of reading a treatise on how aspect ratios work worries you, fear not: Mike Pasini, Editor of the Imaging Resource Newsletter, has written a short, entertaining, and above all clear explanation of aspect ratios and, more importantly, how to adjust your images before you print them so they come out looking their best. A handy aspect ratio calculator shows you exactly how to crop your photos so they'll fit. It's an excellent resource for anyone who prints photos.