Apple Final Cut Express 4 - Manual (Page 434)

434 Part VI Rough Editing
Linking and Unlinking Video and Audio Clip Items
in the Timeline
You can link additional clip items to already linked items, or remove items and then
relink the remaining items.
Linking Video and Audio Clip Items
When you link clip items, a sync relationship is established between those items,
according to their position in the Timeline. All linked clip items are marked in sync, and
this new sync relationship is tracked.
To link unrelated clip items in the Timeline:
1 Arrange audio and video clip items in their respective tracks so that they line up the
way you want them to.
2 Select up to one video clip item and up to 24 audio items on different tracks in
the Timeline.
Video and audio clip
items are not linked
together.
Select video and audio
clip items that you want
to link.