RGB mode
The RGB Color Correction panel looks like this:

- Click on the button for the color component you wish to change. From left to right on the panel, they are Red, Green, Blue, Cyan, Magenta, Yellow, and White (all colors).
- Next, select the brightness or contrast by clicking on one of the brightness or contrast buttons.
- Drag the slider to adjust the tonal value, which is displayed in the box. (You can also type a value, if you prefer). You may have to wait a short while for the Drawing Window to show the color correction.
- Keep adjusting the value until you get the desired color correction.