To clarify, hold down the CTRL key and the full stop (UK) or period (USA) key at the same time.

the st in the above 1st example) then Press CTRL +. To make this work in a Google Doc, all you have to do is: Highlight the text to be superscripted (i.e. Press ⌘ + comma (,) How to Superscript in Google Docs (Mac or Windows Select Text after which choose Superscript For Mac users: In the Google Docs document, select the text character, number or symbol to which you want to apply superscript. Superscript and subscript in Google Docs is right for notations, citations, mathematical and clinical equations.