This is the documentation for Pano2VR 4. You can find the new documentation for Pano2VR 5 here.
However, this document is still valid for the current version of Object2VR!
An area hotspot defines an area of interaction within an image. A user can click on this area to cause an action like opening a webpage or to show text. Area hotspots can be added to both VR panoramas and object VR movies.
◊ NOTE: Area Hotspots are not supported in the HTML5 output.