The Autodesk Control Surface > Performing Colour Grading >

# Linear Mode

When Lin is enabled in the Setup Grade menu, the Colour Grading panel and the Function panel are activated with linear colour grading functionality.

Grading in Linear Mode Using the Colour Grading Panel

Use the Colour Grading panel to modify lift, gain, and gamma in the low, mid, and high levels of the image, or across the entire image.

To colour grade in Linear mode using the Colour Grading panel:

1. On the Colour Grading panel, use the following controls.

   Use: | To:
   --- | ---
   First ring | Modify lift in the overall image. To reset, press the F1 button.
   First jog ball | Modify lift in a range of colours. To reset, press the F2 button.
   Second ring | Modify gain in the overall image. To reset, press the F4 button.
   Second jog ball | Modify gain in a range of colours. To reset, press the F5 button.
   Third ring | Modify gamma in the overall image. To reset, press the F7 button.
   Third jog ball | Modify gamma in a range of colours. To reset, press the F8 button.
   F3 button | Toggle between Master and Low levels.
   F6 button | Toggle between Master and Mid levels.
   F9 button | Toggle between Master and High levels.

Grading in Linear Mode Using the Function Panel

When the Grade menu is enabled, you can use the Function panel to:

- Modify hue, contrast, gain, and saturation values.
- Balance lift, gamma, and gain values for the red, green, and blue channels.
- Set black and white clip and reference values.

To colour grade in Linear mode using the Function panel:

1. Press the Grade button on the Navigation panel.

   The In Primary, Out Primary, Inside, and Outside options are activated.

2. Do one of the following:
   - Press the F1 option button to work on the initial primary grade.
   - Press the F2 option button to work on final curve modifications.
   - If you are colour grading a secondary, either a key or a geometry, use the numeric keys on the Navigation panel to select and enable a secondary layer. See Adding Secondary Layers.
3. If you are accessing the Grade menu after having created a geometry or key, do one of the following:
   - Press the IN option button to grade inside the secondary.
   - Press the OUT option button to grade outside the secondary.
4. On the Function panel, use the following controls.

   Use: | To:
   --- | ---
   Wheels | Modify overall hue, contrast, gain, and saturation. Wheel 1=Hue Wheel 2=Contrast Wheel 3=Gain Wheel 4=Saturation To reset a wheel, press the button above it.
   Knobs at top left | Balance the RGB channels. Knob 1=Red Knob 2=Green Knob 3=Blue To reset a knob, press the button below it.
   Buttons in left centre column | Toggle the type of value to be adjusted in the RGB channels (Knobs 1-3). F1=Lift F2=Gamma F3=Gain
   Knobs at top right | Define values to clamp minimum and maximum luminance. Knob 4=Black Knob 5=White
   Buttons in right centre column | Toggle the type of black and white values to be adjusted (Knobs 4-5). F4=Clip F5=Reference
   SHOW button | Toggle the geometry wireframe on or off.