Actually - I know there is because I'm certain that I've done it, but for the life of me I can't find the post where I did it and I can't remember how.

Does anyone know what the codes are?

There are not UBBCodes for sub or super script, but you can use HTML to achieve those if you have permission to use HTML in your posts.

So, I misspoke a bit. While we do not have a superscript, we do have a subscript.

You can achieve that by using the sub code:

[sub]My subscript text[/sub]

This UBBCode does not exist in the posting form user interface, though. For a thorough list of UBBCodes, check out Tools > Help.

Thank you Steven.

I think that at the time that I did the superscript we had html turned on. I'm pretty sure that it is turned off now.