How do you contrast individual channels?

I tried to change the brightness/contrast of one channel (red channel, etc.), but it still applies to all of them, even if I select one of them. I havn't been able to find and option that will allow me to work with them individually. All help would be great.

It's because you're selecting the command in the settings panel. To change only a single lane, you have to select the command Image-> adjustments

Tags: Photoshop

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