Using Levels But Want To Learn Curves?

If you're already using Levels, and you want to make the jump to using the more powerful Curves, but you're wondering how Curves relates to what you've been doing in Levels, then you'll love this example. It's an interactive tutorial from Greg Apodaca,and it does a great job of helping you make the jump, by showing exactly how they relate. Check it out at http://homepage.mac.com/gapodaca/teacher/lev_crv/lev_crv.html