Thread:Manuel de la Fuente/@comment-30992949-20190814095156/@comment-5774380-20190815000336

Hello,

The upload notification is pure CSS, you can find it on our MediaWiki:Wikia.css under "Image uploader notice".

The custom rail is done with JavaScript, this is the relevant script. Be careful with what you add there and put the minimum amount of widgets you require, as Fandom has very strict customization guidelines in that regard.