Abstract: A technique allows a user to project content onto a shared display region in a controlled manner. The technique involves receiving context information that describes a context in which a user is currently interacting with a local user computing device. The technique then determines, based on policy logic and the context information, whether it is appropriate to invoke a private state, or to remove the private state and enter a shared state. The private state involves presenting a privacy screen on one or more shared display regions. The local user computing device remains connected to the display device(s) that host the shared display region(s) while operating in both the private state and the shared state. According to one advantage, the technique eliminates or reduces the risk that the user will inadvertently release private information to others; further, it does so without asking the user to perform burdensome preparatory actions.

Abstract: A multi-user aware (“MUA”) computing device, such a communal computing device like an interactive digital whiteboard, can enforce role-based constraints on the modification of components, such as configuration settings. The MUA computing device can be configured with universal settings, global settings, and temporal settings. Universal settings cannot be changed by users of the MUA computing device. Device owners can change global settings that apply to all users of a MUA computing device. All users of the MUA computing device can change temporal settings. Changes to temporal settings are stored in profiles associated with authenticated users but are not persisted for guest users. When all users have stopped using the MUA computing device, the device can be configured with default values for the temporal settings in order to return the device to a known state.

Abstract: A multi-user aware (“MUA”) computing device, such a communal computing device like an interactive digital whiteboard, can enforce role-based constraints on the modification of components, such as configuration settings. The MUA computing device can be configured with universal settings, global settings, and temporal settings. Universal settings cannot be changed by users of the MUA computing device. Device owners can change global settings that apply to all users of a MUA computing device. All users of the MUA computing device can change temporal settings. Changes to temporal settings are stored in profiles associated with authenticated users but are not persisted for guest users. When all users have stopped using the MUA computing device, the device can be configured with default values for the temporal settings in order to return the device to a known state.