PDF Merge now supports dragging files to reorder them directly.
- Drag to reorder: grab any file row and drop it where you want — the order updates instantly. The row being dragged turns semi-transparent, and the drop target is highlighted with a border so you always know where it’ll land.
- The arrow buttons are still there: the up/down arrows for moving a file one spot at a time still work, so use whichever feels easier.