Replacing Previous/Next with Page Links

I’ve been using the Water Lily theme for a while now and love it. I’ve posted a lot of photos and scrolling thru all the photos using the Previous and Next feature can get quite cumbersome. Can you let me know how to replace it with “Page” links at the bottom (i.e. Page 1 2 3 4 etc.)? It would be greatly appreciated. Thanks again.
Here is my website: https://www.galleryviews.com/wordpress/?cat=14