How to Create and Center a Background Image (Watermark)

To insert a fixed watermark on your page, follow these steps:
In Page view, open the page on which you want to add a watermark.
Right-click the open page, and click Page Properties on the menu that appears.
Click the General tab. Click Style.
Click Format and then click Border. In the Borders and Shading dialog box, follow these steps:
Click the Shading tab. Click Browse.
Select the image that you want as the watermark, and then click Open.
In the Vertical Position list, click center.
In the Horizontal Position list, click center.
In the Repeat list, click no-repeat.
In the Attachment list, click fixed.
Click OK.
Click OK two more times.
Save and close the page.
To preview how your page will look, click Preview in Browser on the File menu.