Roll

A roll edit (also called a rolling edit) is a trim operation that moves an edit point — the cut between two adjacent clips — forward or backward in the timeline while simultaneously adjusting both clips to compensate: the clip before the edit point gains or loses duration from its out-point, while the clip after the edit point gains or loses duration from its in-point by the same amount. The key characteristic is that the total duration of the sequence is unchanged — one clip gets shorter as the other gets longer. You're not adding or removing material from the timeline; you're redistributing the timing of where the cut falls between two existing clips.

The practical use case for a roll edit is adjusting cut timing when both clips have sufficient handles (extra footage beyond their current in and out points) to accommodate the change. If you have an interview clip followed by a cutaway, and you want the cutaway to start slightly earlier than it currently does, a roll edit moves the cut point earlier — the interview clip ends sooner, the cutaway begins sooner, and the overall sequence length stays the same. This is the most elegant way to fine-tune cut timing in an assembled sequence because it doesn't require repositioning any other clips and doesn't create gaps.

For editors refining a cut to music or refining the timing of a dialogue edit, the roll edit is a precision tool. After a rough assembly is in place, rolling the cut points between clips to align more precisely with musical beats or to better time a spoken phrasing is a common refinement pass. In most NLEs, the roll edit tool is either a dedicated tool (the "Rolling Edit" tool in Premiere Pro, accessed by pressing N) or invoked by modifier keys. Understanding the distinction between ripple (which changes total sequence duration) and roll (which doesn't) helps editors choose the right tool for each trim decision, avoiding the accidental desynchronization of a carefully assembled sequence.