Board Thread:Support Requests - Designing Your Wiki/@comment-33688175-20200523192433/@comment-25014407-20200523215423

Then you're looking for more CSS, not specifically related to the tabber itself. Although the tabber itself has some questionable coding, the main thing you should know about it here is the #ifexist statements. There is more information about it on the MediaWiki page. There is also which is just a dynamic function for the title of the page that the template is used on.