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