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The Hue/Saturation adjustment allows you to vary the basic color of an image and its saturation or intensity. Almost every image looks better with a little extra pop from increased saturation. You can use this adjustment alone or maybe after you've varied contrast and brightness with another kind of adjustment like Levels or Curves. Let me show you how Hue/Saturation works. Like other adjustments, I'd like to apply this adjustment as an adjustment layer. So I'll go to the Adjustment panel and I'll click the second icon from the left in the middle row here, and that adds a Hue/Saturation adjustment layer to my Layers panel and it changes the controls in the Adjustments panel to the Hue/Saturation controls.
Let's take a look at this first slider, the Hue slider. If I drag that to the right, it changes the hue of everything in the image. You can get some pretty wacky effects this way. Let me put that back. To show you the Saturation slider here, if I drag that to the right, it saturates my image globally affecting all the colors. And if I drag to the left, it de-saturates everything. If I go all the way to the left, I can take it all the way down to Grayscale. I am going to reset by clicking this icon at the bottom of the Adjustments panel.
You don't have to apply Hue/Saturation adjustments to all the colors in an image. There are several ways to limit your changes to just a specific range of tones. My favorite is the new On Image control, which is located right here. I am going to click that and now if I come into the image and I click say in this blue water and I drag to the right, I increased the saturation of just the cyans in the image. And if I drag to the left, I decrease the saturation of just the cyan colors. Let me reset that to show you something else you can do with the On Image control.
Now I am going to hold down the Command key on a Mac or the Ctrl key on a PC as I drag, and this time I am varying the hue of the cyans. You can see that Hue slider moving back and forth with me. Another way to limit my changes to ust a range of tones is to use this menu here, and to choose for example Reds. And now if I increase Saturation, it affects the reds in the image. If I want that change to affect other colors, say yellows, I am going to take this Plus Eyedropper down here and click on the yellow portion of the image and you can see that that became more saturated too.
These gray sliders indicate which colors are going to be changed. The colors within this dark-gray portion are targeted for change, and the colors that fall within these light-gray portions on this side will partially change. They are in the fall-off zone. You may like a have a monotone effect in your image. To get that you can go to the Colorize checkbox and click there, and then you can come to the Hue slider and drag until you have the monotone that you like.
You can also vary the Saturation of that effect. And finally, if you come to be menu at the top of the Hue/Saturation Adjustments panel, you can find some useful presets like Sepia or Cyanotype. So those are some ways that you can use the Hue/Saturation adjustment layer to change the basic color or the saturation of colors in an image. If you find that the Saturation adjustment in this dialog box is too strong for a particular image, or if you happen to be working on skintones, you can't get the saturation just right here.
There is another adjustment that you may want to try. That's the new Vibrance adjustment, which I cover in another movie.
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