Board Thread:Support Requests - Designing Your Wikia/@comment-25015638-20150902204113

I saw that the Steven Universe wiki has a custom 404 page, and I wanted to make a custom one for the Fan Papa Louie Customers wiki and the wikis I made, but don't know what page the content for the 404 page is under. (I assume it has a page I can edit, since effectively everything does.) What page is that on? 