Board Thread:Support Requests - Designing Your Wiki/@comment-24203080-20170302072944/@comment-25390652-20170302192650

Ah, I see. The good side is that you don't need to wait for JS confirmation (takes a few days sometimes), but if you have ~100 infoboxes with individual themes it would produce a lot of css code.

So... to do that, you need to change the infobox theme. I would recommend to use width in the theme name. For example, this code goes to your template:  and you will need to use it like this:

that would change the infobox theme, so City theme would not be applied. If you chose 100px, the infobox will have the .pi-theme-100px HTML class. So you will have to add next lines to your MediaWiki:Common.css page: so... for each width you would need to make a css line. E.g: