Board Thread:Support Requests - Getting Technical/@comment-13918697-20141114160124/@comment-452-20141116145328

That's CSS - it goes on a CSS page such as Mediawiki:Wikia.css. (See Help:JavaScript and CSS Cheatsheet for more info.)

Once that CSS is added to your wiki's CSS, that page should look like this:



You may also want to center the caption, or at least add some padding.