If you intend to view your document on-screen or on the Internet, you can apply a theme to the document to enhance its appearance.
Themes appear only in Print Layout, Web Layout, and Reading Layout views, and some elements of themes, such as backgrounds, do not print.
Click to display the document in Print Layout view.
Click Format.
Click Theme.
The Theme dialog box appears.
The list of available themes appears here.
Click a theme.
Repeat step 4 until you find a theme you want to use.
Click OK.
Word applies the theme to your document.
How do I remove a theme?
Follow these steps:
Follow steps 1 to 3.
Click (No Theme) in the Choose a Theme list.
Click OK.
Word removes the theme from your document.