The Download all button lets the customer download all the photos in a gallery at once.
How to enable it
It is a general setting that can also be configured in each gallery. To set it generally:
1. Go to Client Galleries / Settings / Download (General tab).
2. Turn on Show download all button.
3. In Where to display the button choose Galleries and searches, Only galleries or Searches only, and click Save at the top right.

