How to Apply a Theme to a Word 2007 Document
You can apply built-in and custom themes to your Word 2007 documents. Because you can use only one theme at a time, choosing a new theme replaces the current theme.
1Click the Themes button.
It is located in the Themes group on the Page Layout tab. After you click it, the Themes menu appears.
3Click to select a theme.
The theme is applied to your document.