Cascading Style Sheets (CSS) are one of the greatest features to come out of the World Wide Web Consortium (W3C). CSS simplifies repetitive formatting tasks , such as indenting the first line of every paragraph, by defining styles to be applied within a page. Attaching the same CSS stylesheet to multiple pages (or to the template on which multiple pages are based) makes it easy to redefine styles globally throughout your site. CSS can be used to set page attributes (such as margins and background images), provide rollover states for hyperlinks , align images, and format tables.
An exhaustive discussion of CSS is beyond the scope of this book, but this chapter will give you a good overview and cover its use in Dreamweaver. For full details on CSS, see Cascading Style Sheets: The Definitive Guide by Eric A. Meyer (O'Reilly). For quick-reference information including browser, CSS1, and CSS2 support, choose O'Reilly CSS Reference from the Book pop-up menu in the Reference panel (Window Reference).