Board Thread:Support Requests - Getting Technical/@comment-31892545-20190411190930/@comment-5811199-20190413010524

There used to be a 'Hero Image' a few years ago that had an interface that allowed you to upload a hero image and adjust it. This feature was removed, though the header was reused in some wikis for the Community Page header.

I'm pretty sure that uploading a file to File:Community-Page-Header.jpg is the only way of updating the header.