Apple Color 1.5 - Manual (Page 225)

Using Color Balance Controls with a Control Surface
The three color balance controls correspond to the three trackballs, or joyballs, on
compatible control surfaces. Whereas you can only adjust one color balance control at
a time using the onscreen controls with a mouse, you can adjust all three color balance
controls simultaneously using a hardware control surface.
When you’re using a control surface, the Hue Wheel Angle and Joyball Sensitivity
parameters in the User Prefs tab of the Setup room let you customize the operation of
these controls. For more information on adjusting these parameters, see
Control Surface
Settings .
Rebalancing a Color Cast
By dragging the handle of a color balance control, you can rebalance the strength of the
red, green, and blue channels of an image to manipulate the quality of light in order to
either correct such color casts or introduce them for creative purposes. The color balance
controls always adjust all three color channels simultaneously.
In the following example, the image has a red color cast in the highlights, which can be
confirmed by the height of the top of the red channel in the Parade scope.
225 Chapter 9 The Primary In Room