Which trim function affects both A side and B side equally?

The dual roller trim function is specifically designed to affect both the A side and B side of an edit point simultaneously. This allows for more precise control over the timing and duration of both clips around the edit point. When using the dual roller trim method, adjustments made to one side of the edit will also impact the adjacent clip, leading to an equal change in duration or start/end points for both clips.

In contrast, the other options operate differently. For instance, slip trim affects the content within a specific clip without changing the overall timing of the edit itself, only moving the clip forward or backward within its duration. Ripple trim adjusts one side of the edit point and causes the adjacent clips to move in response to maintain continuity, but it does not equally adjust both sides at the same time. Extend Edit adjusts the length of either the outgoing or incoming clip while keeping the adjacent clip in place, making it unequal in its impact on both sides. Therefore, the dual roller trim is unique in its capacity to equally modify both the A and B sides of a cut during editing.