Apple Final Cut Express HD: Getting Started - Manual (Page 96)

96 Chapter 6 Fine-Tuning Your Edit
Doing a Roll Edit
A roll edit moves the edit point where two clips in your sequence meet. Both the Out
point of the outgoing clip (to the left) and the In point of the incoming clip (to the
right) of the selected edit point move simultaneously.
A roll edit changes the duration of the two adjacent clips as the edit point is moved,
but the overall duration of your sequence stays the same.
Roll edits are useful when you want to match the action of one clip with the action of
another and you need to find the right intersecting frames. For example, if one clip shows
a woman opening a door and walking into a house, and a second clip from the inside
shows the door opening and the woman walking in, you can edit these clips together so
that the actions match as closely as possible. You can then do a roll edit to move the edit
point between these two shots until you find the perfect frame for this cut.
A B C
A B C
Before edit
After edit