How to quickly add superscript and subscript in word 2016 Office for Businesses #MicrosoftWord Step 1. To add superscript in word Step 2. To add Subscript in word 1. To add superscript in word Simple press Control (plus) shift (plus) plus sign. Try it, right now. 2. To add Subscript in word Simply press control (plus) euqal to. See keyboard. | WAGmob: Simply Better Learning and Training