Currently, unless I am missing something, editing a photo grid is a bit of a drag. It would be helpful if:
1. We could drag a photo to its correct place rather than use the arrows (to move it forward or backward in the photo order).
2. We could group some photos together so they moved as a bloc rather than move each individually.
3. We could pin blocs of photos that are organized in a way we are happy with.

1. Add captions to individual photos in the grid.