Subscript, or sub, letters are important when writing math or chemistry formulas because, without these letters, the formulas would be unintelligible. Excel was designed to write and use math or ...

If you accidentally press a certain key on your keyboard, you can unwittingly turn on the overtype mode. If you attempt to type a letter between other letters in overtype mode, the new letter ...

Guidelines: All letters to the editor will be considered for publication in print and online. Because of the volume of correspondence we receive, we cannot respond to everyone individually. The ...