Superscript and Subscript
Superscript and Subscript behave differently from all other buttons, because it is
possible that what you want to subscript or superscript could be more than just one
character. To superscript or subscript a character, you will first type out its
base and the part you want to superscript or subscript, select that part that you
want to subscript or superscript, and click the button. The difference here is
that you have to select the part that you want to subscript or superscript.