Word 2010 is a powerful application included in Office 2010 and it comes with tons of features. Apart from using it for creating documents, you can also do variety of other tasks. You can set a background image for any word document just like the way you can set a color for document background. Adding image as background makes it suitable for creating invites or greeting cards. To add a background image to Word, select the Page Layout tab and under the page background group, select Page Color.
Click on the Fill Effects and select the Picture tab in the Fill effects settings window.
Related Reading: Background Removal Tool in Word 2010
Here you can browse for any image from your desktop, make sure that the image is pretty big, so that it occupies the complete area.
Now you can see the image perfectly added to the background and it will not be altered by any text you add to the document.