Like most Web sites and Web applications, SharePoint uses cascading style sheets (CSS) to apply colors, graphics, and positioning to the various objects that make up the pages on a site. In many cases, there are multiple style sheets applied to a page. To customize these styles, you can modify them directly in the master page, page layout, or site page, or modify the styles directly in the CSS file attached to the page – both of which you can do using the powerful CSS editing tools in SharePoint Designer 2010. You can also customize your SharePoint themes using CSS files. By customizing CSS files, you alter the look, or “skin,” of a SharePoint site so that it has your corporate look.