Foundry Gallery - 1 row - 24 pictures?

Hi and good day,

4 images (thumbnails) per row is fine.

However, what I’d like to accomplish is, apart from having 4 images (thumbnails) per row, to throw in more photos, which will be hidden until the user selects 1 and scrolls sideways.

This is so because I don’t want so many images on the page, except if the user wants to see the lot.

Maybe this can be done another way if Foundry Gallery can’t do it.

any suggestion is welcome!

with best regards, Omar KN, Sweden