Apple Final Cut Pro 7 - Manual (Page 633)

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.
Starting Timecode Offset Is 5:00
In this example, clips that have starting timecode numbers within a 5-second range are
grouped together. The first multiclip contains five angles, but the other multiclips are not
yet grouped properly. A larger timecode offset is required.
Timecode offset
is set to 5:00.
633 Chapter 42 Working with Multiclips