Apple Final Cut Pro 6 - Manual (Page 1216)

Chapter 20 Keying, Mattes, and Masks 431
II
To use the standard numeric controls, do one of the following:
m In the Chroma Keyer tab, click the Numeric button.
m Click the Filters tab.
In the Chroma Keyer
tab, click this button
to use the standard
numeric controls.
Standard numeric interface
of the Chroma Keyer