title: adding a superscript or subscript to a button title using the interface builder in Xcode 8
body: <p>I would like to create a button who's title is x squared but I cannot find any info on how to add a superscript to the x.  All I can find is how to create subscripts and superscripts in pages or in word.  I don't want to have to copy and paste.  Is there a way to do it using the interface builder in Xcode?</p>