The Curves command is also discussed at length in Chapter 5. However, for color correction (rather than tonal adjustment), you want to work on each channel individually, choosing each in turn from the pop-up menu at the top of the Curves dialog box (see Figure 6-8).
Although working on each channel with Curves can be very effective, it can also be rather time consuming, with lots of flipping back and forth among the channels as one adjustment makes another channel correction look like a bad decision. While it may be inconvenient, Curves is a very powerful color correction tool.
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