By default, many parameters in Nuke automatically gang channels for you. For example, if you drag on the Gain slider in the ColorCorrect node, you simultaneously affect the R, G, and B channels (assuming you’re processing the RGB layer). You can, however, use the parameter’s channel chooser button to reveal and edit the values assigned to individual channels.
| 1. | Click the parameter’s channel chooser button. The number on its surface lets you know how many channels are available for editing. A series of input fields - one for each individual channel - appears. |
| 2. | Edit the values in any of the revealed input fields as necessary. |
You can also use a color slider for editing individual channels. See Using the Color Picker and Color Controls.