Board Thread:Support Requests - Designing Your Wiki/@comment-44489372-20200122012603/@comment-9605025-20200122024559

Just to clarify, the RWBY wiki isn't using actual tabs. Even though the template is called "Tabber", it uses neither the actual Tabber extension nor Tab View. What they are using is a common tab alternative which I have more commonly seen referred to as Tabs, ParentTabs, or PageTabs. What this alternative does is provide a bunch of links to other pages and then add a bunch of CSS formatting to make them look like tabs. The "Theme" you are referring to is just a template parameter that changes which class is associated with the "tabber". By changing the class, they are able to change which CSS is applied and thus how it appears. - Edit:

If you want to use either Tabber or Tab View, you can still customize the appearance using CSS. The exact details would depend on what customizations you want and where.