Frequently Asked Questions Information Technology Services Log In Help Current: My username is supposed to be my first name underscore last name (firstname_lastname). How do I make an underscore? My username is supposed to be my first name underscore last name (firstname_lastname). How do I make an underscore? The underscore is made by pressing the Shift and Hyphen keys at the same time on your keyboard. This will work on either a Windows or Mac computer. ×