The Autodesk Control Surface >

# Performing Curves Grading

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

- Modify Hue and RGB curves either after the initial primary colour grade, or after the addition of any Lustre Sparks® effects.
- Adjust the Hue, Lightness, Saturation, and Luminance curves separately.
- Modify the entire curve uniformly or modify individual vertices for RGBCMY channels (red, green, blue, cyan, magenta, and yellow).

To modify Hue and RGB curves:

1. Press Curves on the Navigation panel.

   The In Primary, Out Primary, Hue, and RGB options are activated.

2. Do one of the following:
   - Press the F1 option button to indicate that you are working on the initial primary grade.
   - Press the F2 option button to indicate that you are working on final curve modifications.
3. Do one of the following:
   - Press the F3 option button to work on Hue curves.
   - Press the F4 option button to work on RGB curves.
4. On the Function panel, use the following controls.

   Use: | To:
   --- | ---
   Wheels | Make overall changes to curves. Wheel 1=Hue curves Wheel 2=Lightness curves Wheel 3=L-S curves Wheel 4=Saturation curves To reset a wheel, press the button above it.
   Knobs at top left and top right | Individually modify RGBCMY curve points. Knob 1=Red Knob 2=Green Knob 3=Blue Knob 4=Cyan Knob 5=Magenta Knob 6=Yellow To reset a knob, press the button below it.
   Buttons in centre column | Select the type of curve to be modified using the RGBCMY curve points. F1=Hue F2=Light F3=Saturation If you press the F1 button when working with RGB curves, you are toggled to Hue curves.
   First row of buttons at bottom right | Select the low point, mid point, high point, or all for the L-S curve. F1=Low F3=Mid F5=High F7=Master
   SHOW button | Toggle the geometry wireframe on or off.