[This documentation is preliminary and is subject to change.]
The user interface (UI) in Microsoft SharePoint Foundation has been upgraded significantly. This includes the introduction of the Ribbon, a revamped master page, and new cascading style sheets (CSS). Each of these enhancements creates a more consistent experience for users across pages and makes it easier to work with objects inside SharePoint Foundation.

User Interface Improvements
The following elements have been upgraded in SharePoint Foundation.
The Ribbon
The Ribbon was introduced to make the command surfaces in SharePoint Foundation easier to use. The commands are logically grouped into tabs and groups to help users find commands more easily. The Ribbon can also be extended to include customized tabs, groups, and commands. For more information about the Ribbon, see Building Block: Ribbon.
Master Pages
In SharePoint Foundation application pages now reference the site master page. Content and application pages now contain the same content placeholders in SharePoint Foundation. Administrators can turn off custom master pages for application pages as well. For more information about master pages, see Default Master Pages in SharePoint Foundation.
Cascading Style Sheets

See Also