Apple Motion 3 - Manual (Page 984)

984 Chapter 11 Working with Generators
The default Checkerboard generator appears in the Canvas, Layers tab, and in the
Timeline, and the HUD appears.
The Checkerboard generator HUD contains controls for editing and animating the
checkerboard, such as Opacity, Blend Mode, Width, Height, Color, Size (of the checkers),
and Contrast. The only Checkerboard parameter that does not appear in the HUD is
Pixel Aspect Ratio (which appears in the Inspector).
2 Click the Color 1 color well and select a new color. If you are using the color wheel, click
the center point and drag the pointer to select a new color.
Checkerboard generator in Layers tab
Checkerboard generator HUD