The Toolbox is a new window that appears when you click the Toolbox button on the Standard toolbar or when you choose View > Toolbox. It has four icon buttons at the top that switch between panes of the Toolbox window:
Scrapbook: An Office-wide repository for clippings, replacing the earlier Office Clipboard
Reference Tools: Brings together the dictionary and thesaurus with two new features that allow you to perform an online search of the Encarta Encyclopedia and MSN.com
Compatibility Report: A new feature giving you a sense of whether your document will work in other versions of Word
Projects: Provides access to the Project Center
You can also summon a particular pane of the Toolbox window directly, by choosing a command ...