I just ran into the exact same issue and came up with a fast and easy solution. Proceed to Tools, Customise Keyboard. Then select structure, from here scroll down to the bottom part where it offers superscript and subscript. Here you can assign a brand-new keyboard brief slice for each.
To make a custom subscript format or superscript format with numbers other than 1, 2, or 3, copy the needed character from here. For example, to insert superscript 5, set up a custom format with this code: 0⁵. Question: How do I create a subscript value in a cell in Microsoft Excel 2016? Answer: Select the text that you wish to convert to subscript. This can either be the entire cell or only a character in the cell. While your mouse is over the selected text, right-click and then select 'Format Cells' from the popup menu.
Well on Word 2011, if you click on the Home tab you should see 2 icons that start with the letter A and one contains raised text (numerical 2) and the other contains a lowered text (numerical 2). These are the super/sub script buttons. It works in Word 2003, 2007 and 2010, even though this Microsoft Support article might make you think that it only works up to Word 97. Did you know that you can do a find for something like H2O and replace it with H 2 O?
After numerous tries to discover a set of tips not currently designated to anything else, I found 'Choice essential with F5' works and 'Option essential with Y6'. It is today quicker thán if they whére in the tool bar:) PS.
I feel running on a Mac pc. So your key selection may vary.