The height of the graph indicates the number of pixels at each brightness level from 0 to 255. In Photoshop, it’s a graph of the image that can show you the image’s brightness levels overall or broken down by color. If you ever studied statistics, you already know that a histogram is a type of graph. As with the Info panel, the Histogram panel doesn’t actually do anything, but if you learn how to use it, you can really improve the quality of your pictures. ![]() ![]() Photoshop’s Histogram panel was once a dialog box now it’s even easier to get to, and you can have it open on your screen all the time. These are the times when you’ll want to work with individual adjustment settings. ![]() Variations is a quick and intuitive way to adjust color, but sometimes it doesn’t give you enough control. Sams Teach Yourself Adobe Photoshop CS4 in 24 Hours, 5th Edition
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