A/B editing

 A style of video editing in which you edit together clips in pairs - A and B - typically with a transition from one to the next. In Premiere, the A/B Editing workspace configures the Monitor window in Program view and the Timeline with separate expanded tracks for Video 1A, Video 1B, and Transitions. This style is useful for assembling a program with simple drag-and-drop convenience. See also single-track editing.