Putting symbols into Title

I think that getting the symbol is one issue - and getting it superscripted is another.

I was able to get the registration symbol easily by copying from Word, and the Alt key method works too.  However, for lesson titles, I cannot select it, right click and choose to superscript it - I can do this for every time it appears in random text. My client certainly noticed the difference. Is there an open request for this ability?  Thanks in advance.