Board Thread:Support Requests - Getting Technical/@comment-34757329-20181130041635

I own a wiki and a friend of mine is the only admin of the site (besides me of course), but sometimes (I mean most times) he disobeys me and does stuff on my wiki that I don't agree on doing. Is there a way I can adjust the admin rights? For example, can I disable the admin's right to upload image, delete pages, or create templates? 