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This next step is more for power users and that's how do you set a point in each color channel of a Curves adjustment layer. So let's begin by adding a Curves adjustment layer to our document here. So as you mouse around, you don't see any feedback with just the default cursor, but if you switch to the Targeted Adjustment tool, this little icon here in the Adjustment panel. Now as you mouse around, you get the dancing donut on the graph over here in the Adjustment panel. Now you can see the circle on the graph there. If you just click, you get a point set for the RGB Composite channel, right. So I'm going to undo that.
If you want to set a point for each individual channel, so if I go up here to the pop-up list here, there is the Red, Green and Blue individual channels because you're going of course do curve adjustments on each channel separately. The default is set to the Composite though. If you want to set a curve point for each channel individually, you hold down Command and Shift on the Mac, Ctrl and Shift on Windows. So if I go ahead and click right there, Command+Shift, Ctrl +Shift, it doesn't look like anything happened because you don't see any dot in the Composite channel now. But let's use our shortcuts to navigate to each individual channel for the Adjustment panel here. That would be Option or Alt on Windows 3, 4 and 5.
So Option+3 takes me to the Red channel. You can see where it dropped that point on the Red channel for me. Option+4, Alt+4, there is the Green channel. And there is its representative dot. Option+5 takes me back to the Blue channel where I can see the dot for the Blue channel. So Command+Shift-click sets points for that particular tonal range in each individual channel for you and then you can go and manipulate each one separately by navigating to each channel. To get back to the Composite RGB channel, that of course is Option+2 or Alt+2 to take you back to the Composite.
There you have it. All those shortcuts work exactly the same in the dialog version of Curves. Again, Command+Shift- click in the image with the dialog open will set the curve points for each individual channel, both in the Adjustment panel version and the dialog version of Curves.
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