Making channel-by-channel adjustments

In this movie, I'll show you how you can change the color…balance of an image by applying levels on a channel by channel basis.…So many of you will recognize this badly…balanced version of my children here from chapter eight.…I'm going to drop down to the black white…icon, click on it, and choose the levels command.…And notice that in addition to correcting the composite image, meaning all…channels at the same time You can correct each one of the channels…independently, and we have keyboard shortcuts to switch between them as well.…Of Alt-2 through 5 here on the PC, that's option+2 through 5 on the Mac.…

And so for example, if I thought there was too much red in this image, I could…switch to the red channel, and I could go…ahead and drag that gamma triangle to the right.…Then if I feel like I've got too much green then I…could switch to the green channel and drag it's grey triangle as well.…Thing is that's kind of…a pain in the neck to have to switch between channels…and just make guesses about what it is you're supposed to do.…