When the Curves menus is enabled, you can use the Function panel to:
To modify Hue and RGB curves:
The In Primary, Out Primary, Hue, and RGB options are activated.
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.
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.
F1=Hue
F2=Light
F3=Saturation
If you press the F1 button when working with RGB curves, you are toggled to Hue curves.
F1=Low
F3=Mid
F5=High
F7=Master