This tutorial will explain exactly what curves are. It will show you some of the most famous curves such as the s-curve and explain how they work.

Here are a few basic concepts to help you better understand the curve tool.

Get familiar with the power of the curves adjustment tools.

Create artistic geometric curves using only straight lines.

Learn to create dotted lines and curves.

Learn how to use curves adjustment to correct a specific area such as a wedding couple in a photo where there wasn't a flash.

Adjust the color using the curves command, identifying black, white and gray points with two easy techniques.

Create cable-looking curves that might look good on a website.

This tutorial shows you how to remove a color cast in a non-destructive manner using Curves. Includes a quicktime video.

n this tutorial, I show you how to mix cool retro geometric shapes into your photos

Learn how to realistically change your hair color using a simple curves adjustment. This works for natural colors such as blonde and brown, as well as unnatural colors such as blue, green, purple, etc.

The Image: Adjust: Curves... and all the good things you can do with it!

Part 2 of our photo retouching series. This tutorial covers curves adjustment

Emboss and metallic effects using channels and curves

The histogram can be confusing to a lot of new digital photographers, but it doesn't have to be! In this tutorial you'll discover what the histogram is, how to read it, and why it's important to you when shooting digital photographs.

Learn about the different types of light in photos and how to use them to get the best result.

Get an understanding of swatches and their relation with foreground and background colors.

Far from being voodoo, manipulating levels is a very powerful way to quickly improve an image's tonal range and color balance. In this theory-based tutorial you will learn how they work, and realize how mastery of levels functionality will make you a superior-level Photoshop user.

Far from being voodoo, manipulating levels is a very powerful way to quickly improve an image's tonal range and color balance. In this theory-based tutorial you will learn how they work, and realize how mastery of Levels functionality will make you a superior-level Photoshop user.

Caging the Rhino - Understanding Vector Masks