NEW SNAPSHOT, THE MISTAKE INSURANCE POLICY

The great thing about Photoshop's History feature is that you can (by default) undo your last 20 steps. Perhaps even more important is that you can always return to how the image looked when you opened it, so you never really do any permanent damage (as long as the file is open). However, what if you opened an image, worked on it for a while, and it was really looking great, but about 10 minutes later, it took a turn for the worse (this happens to us more often than we'd care to admit). If you undo the last 20 steps, it may not take you back far enough to the point that you want to return to, and the only other choice is to go all the way back to where you started. Here's a tip to keep you from pulling your hair out: Any time your image is at a stage where you think it looks pretty good, go to the History palette, and at the bottom of the palette, click on the New Snapshot button. Think of it as an insurance policy so that if things go bad, you can at least return to that spot and try again. It's not a bad idea to create a new Snapshot about every five minutes when you're working on a big project. To keep from loading up on snapshots, when you create a new one, delete one or two snapshots before it.