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Let Photoshop Do The Work In Curves

 

Let’s say you’re using the Curves dialog for correcting images and you have an image where you’re trying to adjust the color of some green plants. How do you know where that particular green “lives” on the curve so you can dial in and adjust it? Photoshop can tell you—in fact, you can have Photoshop automatically plot that color on the curve for you. With the Curves dialog open, just Command-click (PC: Control-click) on that color within your image. Photoshop will then add a point to the curve that represents the spot you sampled, and now you’re ready to tweak it.

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Once You’re In CMYK Mode, Stay There

You’ve read some techniques in this chapter that require you to be in either RGB mode or Lab Color mode; however, if for any reason your image is already in CMYK mode, do not (I repeat, do not) convert to RGB or Lab mode for any reason. Once you’ve converted to CMYK mode, the data loss from the conversion has already occurred, and switching back to RGB mode won’t bring back those lost colors. What’s worse is, if you switch from CMYK to RGB (or Lab), when you convert back to CMYK mode, you’ll go through another CMYK conversion and damage your image even more. The moral of this story is-once you’re in CMYK mode, stay there.

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