Which Clip Items Move in the Timeline After a Ripple Edit?
Clip items with In points later in the Timeline than the edit point(s) you are adjusting
will move, or ripple, after you perform a ripple edit. All other clip items remain in the
same position in the Timeline.
Take special care when performing ripple edits with complex edit point selections on
multiple tracks. To make sure you understand how an edit affects the clip items in
your sequence, you can undo (Command-Z) and redo (Shift-Command-Z) your edit
several times to compare the sequence before and after the ripple edit
Ripple edits are done
using the Ripple tool.