This invention provides a method for registering and enrolling multiple users in a interactive information display systems where the untethered multiple users interact with large information displays using laser pointers coordinated with voice commands. A registration program assigns a unique identification to each user that associates a particular user's voice and a particular laser pointer pattern chosen by that user, with that particular user. Users may speak voice commands. The system will then perform speech recognition of the user's voice command. If the command is recognized, the system performs the speech-recognized command as a window operation.