A hotspot is an area that is linked to a Web Analysis Studio service. It is an invisible button that performs a predefined action. You can create a hotspot by making services buttons transparent. The invisible service button can be located over a graphic image, giving the appearance that an area of the image triggers the service.
Designers control the level of transparency. The hotspot can be completely invisible, display a border, or display a border and a text label. Completely opaque Service buttons are considered buttons, not hotspots. see Creating Hotspots.