In Adobe Photoshop non-destructive editing is the way to go, and Adjustment Layers give you the ability to make changes and then "change" your mind; even days later. Let Infinite Skills author, Andy Anderson, show you how they work.
Learn basics to advanced, Photoshop CS6 training with New Features in Photoshop CS6. these tutorials contributed by product experts, Lynda.com, Video2Brain, infiniteskills, Kelby Media Group with world famous authors Chad Perkins, Corey Barker, Deke McClelland, Julieanne, Kost, Justin Seeley, Pete Collins and Tim Grey.