Abstract: Features of the present disclosure solve the above-identified problem by implementing techniques to detect the contact or proximity of a stylus to a display screen of a computer device in the absence of pressure information within the constraints of existing pen protocols. To this end, a digitizer associated with the display screen of the computer device may determine when the stylus is touching (or significantly close) the screen when a signal communication between the pen and digitizer exceeds a threshold (e.g., time or voltage).

Abstract: Techniques for configuration of primary and secondary displays are described. In one or more implementations, an apparatus such as a mobile device includes multiple interconnected display devices that can be configured in different ways, such as output primary, input primary, sensor primary, and so forth. At least one implementation enables different zones of a single display surface to be configured as primary and secondary for different purposes, such as input and/or output.

Abstract: Features of the present disclosure solve the above-identified problem by implementing techniques to detect the contact or proximity of a stylus to a display screen of a computer device in the absence of pressure information within the constraints of existing pen protocols. To this end, a digitizer associated with the display screen of the computer device may determine when the stylus is touching (or significantly close) the screen when a signal communication between the pen and digitizer exceeds a threshold (e.g., time or voltage).

Abstract: Techniques for configuration of primary and secondary displays are described. In one or more implementations, an apparatus such as a mobile device includes multiple interconnected display devices that can be configured in different ways, such as output primary, input primary, sensor primary, and so forth. At least one implementation enables different zones of a single display surface to be configured as primary and secondary for different purposes, such as input and/or output.

Abstract: A platform-level container configured to hold natively-supported ink stroke data structures is maintained. The platform-level container is accessible to a plurality of different applications. An ink stroke visual corresponding to each ink stroke data structure held by the platform-level container is rendered via a display. An ink stroke change event corresponding to an ink stroke data structure held by the platform-level container is recognized. The ink stroke data structure is changed to an updated ink stroke data structure in accordance with the ink stroke change event. An ink stroke visual corresponding to the updated ink stroke data structure is rendered via the display without re-rendering ink stroke visuals corresponding to unchanged ink stroke data structures.

Abstract: A platform-level container configured to hold natively-supported ink stroke data structures is maintained. The platform-level container is accessible to a plurality of different applications. An ink stroke visual corresponding to each ink stroke data structure held by the platform-level container is rendered via a display. An ink stroke change event corresponding to an ink stroke data structure held by the platform-level container is recognized. The ink stroke data structure is changed to an updated ink stroke data structure in accordance with the ink stroke change event. An ink stroke visual corresponding to the updated ink stroke data structure is rendered via the display without re-rendering ink stroke visuals corresponding to unchanged ink stroke data structures.