Except keyboard of F7 and Spell Checkbutton in toolbar, you are also able to apply Spelling check command fromExcel 2007/2010/2013/2016 Ribbon: Click the Review tab; Go to Proofing group; Then you will view the Spellingbutton , that's Spell Check command.
hope this helps
D. All of the Above.
If you are using a Twitter account for marketing your personal brand, you certainly should evaluate your entire profile, which includes your pictures, bio and tweets.