Board Thread:Support Requests - Designing Your Wiki/@comment-29289194-20170909002214/@comment-26923519-20170909174002

Apply the following in your wiki's Wikia CSS or Common CSS (for all skins). This reduces the font size of the text in the title and section header elements, which by default, was 20px. They are reduced to 16px, but this can, of course, be changed into the desired font size.