How To: Redo levels settings in Photoshop CS3

This image editing software tutorial shows you how to redo levels settings in Photoshop CS3. You've spent time working on adjusting the RGB levels of an image, or ANY levels settings and you make a mistake and accidentally lose those changes. The history panel doesn't have them so what do you do? Think you lost the last settings you used while using levels and you have to start over? Think again and watch this Photoshop tutorial to get them back!