Apple Final Cut Pro 6 - Manual (Page 590)

Chapter 16 Working with Multiclips 257
II
Example: Creating Multiclips Using the Starting Timecode and Starting Timecode
Delta Options
By adjusting the starting timecode offset value and clicking the Update button, you
can precisely control how clips are grouped together into multiclips.
Starting Timecode Offset Is 0:00
When the “Starting timecode delta” field is set to 0:00, most of the clips are grouped
as individual multiclips. Only the few clips that have the exact same starting timecode
numbers are grouped together. To group more of the clips into fewer multiclips overall,
a larger timecode offset is needed.
Timecode offset
is set to 0:00.