Reading the Histogram panel

Photoshop offers a useful panel to help you gauge the color. …If you learn to properly read the Histogram panel, you can actually color correct with …an improperly calibrated monitor. What you are working with are absolute values and the …histogram can really come in handy once you understand what it's telling you. …I'll go ahead and choose Window > Histogram to bring it up. I like to go ahead and detach …this, so I'll just tear it right off so it's a floating panel. …I'll then choose to expand it so it shows me more information, and I can go ahead and …show all channels. This makes it easier as I adjust, because I could see the red, green …and blue details, and obviously with this photo there is a lot of red.…

If I want to reposition this image, I'll press F for full screen, and now, using the Hand …tool, I can move it around. This makes it a little bit easier if you need to reframe …within the canvas. …Let's add a levels adjustment, and we are going to make our adjustments one channel at a time. …