If you're short on time, filmstrip mode makes it easier to manage a large collection of photos and videos.
To use filmstrip mode:
In filmstrip mode, you can:
Delete a photo or video. Swipe up or down.
To undelete a photo or video, immediately touch Undo. If you've deleted multiple items, only the last deletion is restored. If you wait too long, the option disappears and the photo or video is permanently deleted.