Abstract: User interface navigation on a personal electronics device based on movements of a crown is disclosed. The device can select an appropriate level of information arranged along a z-axis for display based on crown movement. The navigation can be based on an angular velocity of the crown.

Abstract: In some embodiments, an electronic device optionally identifies a person's face, and optionally performs an action in accordance with the identification. In some embodiments, an electronic device optionally determines a gaze location in a user interface, and optionally performs an action in accordance with the determination. In some embodiments, an electronic device optionally designates a user as being present at a sound-playback device in accordance with a determination that sound-detection criteria and verification criteria have been satisfied. In some embodiments, an electronic device optionally determines whether a person is further or closer than a threshold distance from a display device, and optionally provides a first or second user interface for display on the display device in accordance with the determination. In some embodiments, an electronic device optionally modifies the playing of media content in accordance with a determination that one or more presence criteria are not satisfied.

Abstract: An electronic device may use information about the location of nearby devices to make sharing with those devices more intuitive for a user. When two devices are pointed towards one another, each device may automatically present the option to share information with the other device. When a user wishes to share information with one or more devices in a group of users, an array of icons representing the nearby users may be positioned on the display according to the locations of the nearby users so that the sharing user can easily select which user he or she wishes to share with. A sharing user may broadcast a signal and nearby users may elect to receive the signal by pointing their devices towards the sharing user. A user of two devices may share information between the two devices and may use one device to manipulate the information on the other device.