Apple Final Cut Pro 7 - Manual (Page 582)

Keyboard Shortcut Label Color
Command-Option-6 B-Roll Green
To assign or change a label for a clip in the Timeline
1 Select one or more clips in the Timeline.
2 Press a key combination (from the table above) for the label you want to assign to the
clip items.
The color changes to reflect the new label.
For information about changing labels of clips in the Browser, see “Assigning Labels and
Setting Label Names to Help Manage Media.”
582 Chapter 38 Arranging Clips in the Timeline