The Tangent CP100 Control Surface > Primary Colour Grading >

# Logarithmic Mode: Modifying Brightness and Contrast

You can modify brightness and contrast in several ways from the Grade menu. You can modify:

- Overall brightness and contrast of the red, green, and blue channels together.
- Overall brightness and contrast of the red, green, and blue channels separately.
- Brightness balance and contrast balance.
- Brightness in the shadows, midtones, and highlights.

To modify brightness and contrast:

1. Enable Grade and then do one of the following:
   - Enable InPr to modify the input primary values.
   - Enable OutPr to modify the output primary values.
2. Use the following controls to perform primary colour grading.