CSS layouts is a mechanism of laying out Web pages by using formatting applied via CSS. When you create a CSS layout, you're basically creating a CSS and then applying a style sheet to a Web page for layout formatting. So, instead of using a table to lay out your Web page, for example, you can choose to create a layout based on a CSS. By default, SharePoint Designer provides a number of templates for creating CSS layouts. These are available in the New dialog box in the CSS Layouts section.
To create a new Web page using CSS layouts, follow these steps:
Choose File New to open the New dialog box and then click the CSS Layouts section in the Page tab, as shown in Figure 12.17.
Choose the layout that best suits the layout of the page you want to create.
Click OK. SharePoint Designer creates a Web page and a CSS for you. By default, the CSS is linked to the newly created Web page. By default, the page just has some <div> tags with id attributes that match CSS rules. But when you type some text in the <div> tags, the layout formatting applied by using the CSS layout takes affect, and the content is placed according to the CSS formatting defined in the rules, as shown in Figure 12.18.
The CSS rules in this case are being matched by using the id attribute ...