Apple Final Cut Pro 5 - Manual (Page 1270)

Chapter 20 Color Correcting Clips 483
II
2 Click the Invert Selection button to reverse the key created by the Limit Effect controls.
The Desaturate Highlights and Desaturate Lows Filters
Sometimes, the use of one of the Final Cut Pro color correction filters results in
unwanted colors appearing in either the highlights or shadows of your image. The
Desaturate Highlights and Desaturate Lows filters allow you to target a range of the
brightest and darkest areas of your image and desaturate them, which helps to keep
the highlights and shadows of your image free from coloration.
Invert Selection button
The bicycle remains red and
the background turns into
various shades of gray.