We describe a user interface and interaction technique,named’Javelin’,designed for large display environments.It provides quick access to random screen regions and manipulation methods for screen widgets which are difficult or impossible to reach.It consists of a dynamic global thumbnail,a touchpad widget that drives the screen cursor,and a teleport widget in which interactions are transferred to its target screen region.Javelin can be easily integrated into many programs to optimize their interaction performance in large screens.The experiment and user study show that Javelin can extend user access field and enhance widget manipulation in large displays. We describe a user interface and interaction technique, named ’Javelin’, designed for large display environments. It provides quick access to random screen regions and manipulation methods for screen widgets which are difficult or impossible to reach. It consists of a dynamic global thumbnail, a touchpad widget that drives the screen cursor, and a teleport widget in which interactions are transferred to its target screen region. Javelin can be easily integrated into many programs to optimize their interaction performance in large screens.The experiment and user study show that Javelin can extend user access field and enhance widget manipulation in large displays.