Hi @FrancesRichmond,
I'm not sure if you are referring to school/institution administrators (line a Principal, Dean, Department Chair, etc) or Canvas Admins. For Canvas Admins, there is no need to add them to a course, as they will have access to courses at your school/institution pretty much automatically as part of their Canvas admin role. For school/institution administrators, you can follow the how do I add users to a course guide, with the caveat that your school/institution may have policies in place restricting who is allowed to do this in the system. If you don't see the buttons mentioned in the guide, you'd likely need to reach out to your local Canvas team (usually in the eLearning / IT / Digital Education areas).
Hope this helps!
-Chris
