We should have subscript / superscript text formatting buttons for Community posts that add <sub></sub> / <sup></sup> tags, respectively, to a selected piece of text. This would work similarly to existing shortcut buttons like Bold and Italics. It would probably be part of the extended toolbar.
This would be particularly useful on the Mathcad board.
I think that is something we can do. I'll run it by the team and let you know.