I have activated advanced permissions. I have allowed a certain group to edit certain blocks on a page. That's good. What I can't do is find how to prevent them from modifying the nav bar, header, and footer. All blocks in those areas are available for editing for the group that I only want editing certain blocks in the body.

Is there some trick to this? I have to allow the group to edit page contents or they won't get an "Edit" button but there is no way to "Set Permissions" in header or footer.