Apple Final Cut Pro 7 - Manual (Page 813)

The Open ganging option is useful for making filter adjustments to multiple clips in a
sequence. For example, if you have multiple clips that have color correction filters applied
to them, you can move the playhead from clip to clip, and the Color Corrector tab changes
to the current clip’s filter settings.
Using the Gang Playhead Sync Option
You can lock the playhead in the Viewer to the playhead in the Canvas and Timeline so
that they move together while scrubbing through clips. This is known as ganging the clip
in the Viewer window to the sequence in the Canvas and Timeline windows.
When this option is selected, the offset between the current position of the
Canvas/Timeline playhead and the current position of the Viewer playhead is maintained
as both playheads move together. This mode is useful for editing operations in which
you want to set In or Out points in the Viewer using durations defined by items or markers
in the Timeline as your reference.
Example: Trimming a Browser Clip by the Duration of a Sequence Clip
The Gang playhead sync option can help you perform precise trimming operations. For
example, suppose you want to trim the Out point of a Browser clip in the Viewer by the
duration of the last sequence clip in the Timeline.
To trim a clip in the Browser by the duration of a sequence clip
1 Double-click a Browser clip to open it in the Viewer.
2 Press Shift-O to move the playhead in the Viewer to the Out point of the clip.
The Out point is the
sync point for the clip
in the Viewer.
813 Chapter 50 Matching Frames and Playhead Synchronization