Superscript and subscript
As with italics, bold, underlining and highlighting, superscript and subscript can't be added to documents based on a 'protected' template. If you need to use them, add a comment (go to the 'Review' tab and click 'New Comment') to the text that needs changing. An editor can then make the change for you. This is usually a very small job, so doesn't need to wait until the next scheduled edit.