This was originally only available in Classic Photoshop Edits II.
One tool. Curves. It doesn't sound like much, but it may be the most powerful tool that you have in Photoshop! It really comes in handy when you are dealing with unfortunate color casts and undesirable tones in your image. Join Meg in this Photoshop editing tutorial and see how she adjusts the shades of green in this image and removes the green from the skin of her subject to make her look beautiful using only the Curves tool. Watch as Meg separates her from the background and illuminates her using curves to bring the light on her. It's just one tool, but really, it's all you need!