They should be specified as distance from left edge (horizontal pixel count), distance from top (vertical pixel count). desc Specifies the location of a blue «i» icon , which links to the image description. However, you still need to follow the other instructions provided. Define a URL template if most of your Image Map URLs share a common, fixed format. By entering the portion of the URL that is fixed as the URL template, you do not have to enter this portion of the URL each time you create an Image Map.