Organize chapters
Beyond reordering shots, you can manage the chapters themselves.
+ Add chapter — Adds a new empty chapter at the end. Drag shots into it, then commit; an empty chapter you never fill is simply ignored.
Drag to reorder chapter — The grip on a chapter header. Drag it to move the whole chapter — and every shot in it — to a new position among the other chapters.
Collapse chapter — Collapses a chapter to its header so you can focus on the part you're working on; click again to expand it. This only changes what's shown, never the files.