This page documents how to override templates and also mentions themes: https://docs.gitea.io/en-us/customizing-gitea/#customizing-gitea-pages
Thanks for the update.
I wasnt sure how to find out which version gitea.kosmos.org was running
Page footer, on the left.
Or, directly in the Chef recipe from which we deploy this Gitea:
Deleting a branch is permanent. It CANNOT be undone. Continue?