Microsoft Office 2010, typography, and proofing tools

If you press the expansion arrow at the bottom-right of the Home part of the ribbon (or press CTRL-D) you will get the Font dialog. If you select the Advanced tab you can turn on features such as OpenType ligatures. This will mean that with text such as ‘fl’ or ‘ffi’ certain parts of the letters will connect instead of showing white space between the letters. This is the same technique used in printed media such as books.