Board Thread:Support Requests - Designing Your Wiki/@comment-27303303-20170306055110/@comment-26437440-20170306094947

Pretty much everything in the tabs can be changed. These go in your MediaWiki:Common.css

To change the font size: ul.tabbernav { font: bold 12px Verdana, sans-serif; } Just replace the 12px part with whatever size you want. Making the font smaller also shrinks the tabs.

If you want to keep the default font size, you can also use this: ul.tabbernav li a { padding: 3px 0.5em; margin-left: 3px; } Changing the padding to 0 will remove all the gray space from around the tab text, and changing the margin-left to 0 will remove the gaps between the tabs.