This document provides an overview of the new user interface introduced in Microsoft Office 2007. It discusses the Ribbon, which replaces menus and toolbars, and is organized into tabs, groups, and commands. The Quick Access Toolbar allows adding favorite commands. New keyboard shortcuts called Key Tips are introduced to access the Ribbon without a mouse. While the Ribbon aims to display all commands, screen resolution or window size may affect what is shown. Add-ins allow customizing the Ribbon by adding or removing tabs and groups.