Resolution is one of the most commonly misunderstood concepts in digital imaging, though it’s crucial when printing your mementos. You could trudge through life without understanding resolution, and the Print dialog box in most apps and most online print labs alert you if you don’t have enough of it to print. However, mastering resolution enables you to figure out not only what size prints you can make from your pictures but also what the quality will be...click here to read the full tutorial on Macworld.com