Apple Final Cut Pro 6 - Manual (Page 1299)

514 Part III Color Correction and Video Quality Control
With the Waveform Monitor set to display saturation, you can compare the relative
saturation levels of two clips by comparing the thickness of their displayed waveforms.
Modifying the saturation of one clip to match that of another is simple; just adjust the
Saturation control of one of the color correction filters in one of the clips to compensate.
This dip in the waveform
matches the position of
the dog.
An image with high
saturation
An image with low
saturation