23.11 Supplying a background image or watermark
To provide a background image or a watermark, you can assign values to <body> attributes in the configuration file; for example:
body= bgcolor="white" background="yourimage.jpg"
If you are targeting only Internet Explorer (as for HTML Help), to keep the image from scrolling with the text you could add:
All attributes and values must be on the same line, regardless of line length.
A better alternative would be to use CSS. There you could also specify that the image is to be centered, not tiled, which is probably what you would want for a watermark:
body { background-color: white ;
background-image: url(yourimage.jpg) ;
background-repeat: no-repeat ;
background-attachment: fixed ;
body { background: white url(yourimage.jpg) no-repeat center fixed }
> 23 Including graphics in HTML > 23.11 Supplying a background image or watermark