Overlaid Gallery Panel number of items doesn't work 4.1

Is this for everything? Or specific providers (e.g. Flickr). Do you have a link where I can check this out?

Sorry for my delayed replie (I had a short vacation).

I only use it with wp-galleries.

Did you see my link to https://www.italiadesso.nl/photonic-test/

The “columns” attribute just says how many columns your thumbnails should show up in, and there is no provision for a “maximum” number of images to show. I am not sure this plugin can achieve what you are aiming to do.