Board Thread:Support Requests - Getting Technical/@comment-25982240-20151119223022

Hello, huge noob here. On this page of my Wikia I'd like to have a banner at the top that would say something like "Some of the computers mentioned on this page might have never existed so blablabla..." but I don't know how to create one. If you don't know what I mean about a banner well there is one on this page about spoilers, for example. 