Use Background Image
If you want to have a background image in your page, just check this box then you can specify the file by clicking the browse button and selecting the file you want. The name will appear in the box just below this check box.

*Note in order for this image to appear correctly it should be either a JPEG or GIF file. Some other formats will work but may not be compatible with all browsers. Also, the file must be in the same directory as all the other HTML and image files.