![Rolling Eyes :roll:](./images/smilies/icon_rolleyes.gif)
I also posted in 'Addons and Plugins' about a responsive Photo-gallery. Now I found a nice solution, not exactly a plugin so some manual work is necessary, but it is easy to use and fully responsive. You can use as many galleries on 1 page as you like (what I need for a project). Maybe interesting for someone? It works fine with the latest CmSimple XH version as well. https://fancyapps.com/fancybox/3/
Back to the template: when inserting the gallery images using this Fancybox script, and there are 2 horizontal rows, the top and bottom rows 'stick together'. When I test with the standard Rich172 template, there is a space (almost equal) between horizontal and vertical thumbs.
Probably some setting in the css file of fhs-basic, of course a screenshot for more details.