To select large groups of photos, you have to enter into the Select Mode.
The Select Mode is accessible through 2 ways:
- Either by clicking on the Select button on the Header
- Or by long-clicking on a photo
Once you are in the Select Mode, you can
- Select photos and videos one by one,
- Select them all by clicking on the more button (the 3 dots) and "Select All"
- Swipe them to select a large number of them quickly