How to Modify a Theme in Word 2007
You can modify a built-in or custom theme in Word 2007 to suit your needs. You can mix and match different fonts, colors, and effects to create the look you want.
Click the Themes button.
This is located in the Themes group of the Page Layout tab.
Select a theme in the Themes menu.
You may need to scroll through the menu to find what you want.
Select the fonts, colors, or effects you want for your theme.
Use the Theme Colors, Theme Fonts, and Theme Effects buttons in the Themes group to access the different galleries and make your changes.
Click the Themes button and choose the Save Current Theme command.
The Save Current Theme dialog box appears.
Give your theme a descriptive name.
Type it in the File Name box.
Word saves your custom theme, and it appears in the Custom area of the Themes menu.