Kubrick Custom header Image

I would also like to find out a way to do this. I found this generator: https://bighugelabs.com/blogheader.php but it doesn’t have a nice GUI for admins to use.

You can program it into a theme using the Custom Image Header API. If your theme doesn’t already have the capability, you can try to persuade the theme author add it or you can try modifying the theme yourself. If you do modify the theme, note that you would need to re-program the custom header image in each time you upgraded the theme.