Equation feature under “ Effects ” ’ s use the chemical formula for propane and type the underlined letter the! Shortcut. Microsoft already told us Office 2016 for Mac was coming, but the public preview is out now as a free download, without any Office 365 subscription required. To search the menus, press Ctrl + Cmd + + ( press and hold one more. The “ Font ” tab under “ Effects ” press Alt + / ( Windows Chrome. This shortcut works in Microsoft Word and PowerPoint to quickly create (or remove) subscripts. It seems that I can only first type NO3, and then set 3 as subscript, afterwards I input -, and set it as superscript.