When you work in Word, you want to be able to control the look of the text in the documents that you create. The size and appearance of the text is controlled for the most part by the font or fonts you choose to use in the document. Each available font has a particular style or typeface. A variety of fonts exists, with names such as Arial, Courier, Times New Roman, CG Times, Bookman Old Style, and so on; the fonts you can choose depend on the fonts that have been installed on your computer (Windows offers a large number of default fonts; other font families are added when you install Office, and you can purchase software for special lettering and printing projects). Each font has a particular look and feel that makes it unique.
You can change the font or fonts used in a document whenever you need to, and you can also manipulate the size of the characters and their attributes, including bold, underlining, and italic. You can select a new font before you begin typing your document, or you can select text and change its fonts and text attributes at any time.