Groups are incredibly useful to stay organized and to give your editor a map. Drag a box across a run of lines, right-click, and choose Group selected or click the group icon on top to gather them into a named section: an act, a beat, a chapter, mini social videos. Name it whatever it's about. Those groups carry into your editor as named timeline markers, and into your PDF and your client's review as chapter headings. A timeline that arrives already broken into cold open, turning point, and payoff is far faster to finish than a flat string of clips. Need to start over? Reset arrange clears the groups and order while keeping your picks.