Apple Color 1.5 - Manual (Page 205)

• Crosshairs identify that value’s location within the three-dimensional representation
of color in the 3D scope itself.
Each color target is numbered to identify its corresponding color swatch.
• A vertical line appears within the Hue, Sat, and Lum curves of the Secondaries room,
showing the position of the sample pixels relative to each curve.
205 Chapter 8 Analyzing Signals Using the Video Scopes