How To Upload Custom Header?

Assuming your theme does not have the option to add a different header image.( Via WP dashboard )

Is your header image is hard coded in the “header.php”
If so, then you can make your edit there by changing the image URL.( or replace with your new code)

Do you mean a logo?

See this post for comments on similar question.

https://www.ads-software.com/support/topic/theme-frisco-for-buddypress-logo-and-colour

If you’re trying to use an image for the whole header background (not the site title/logo), target the same CSS used to change the color for the header and use background-image instead.

Marking as resolved.