A touch-sensitive display device , comprising: a touch-sensitive display including a plurality of display electrodes (206; 302); a logic machine ; and a storage machine holding instructions executable by the logic machine to: over a series of touch-sensing time frames, interpret electrical conditions of display electrodes (206; 302) of a touch-sensitive display device to estimate frame-by-frame positions of two or more stylus electrodes of an active stylus relative to the touch-sensitive display device ; based on the estimated frame-by-frame positions of the stylus electrodes , predict future positions (606A, 606C; 702; 802) of each of the two or more stylus electrodes during a future touch-sensing time frame; identify regions of interest (608; 704; 804) on the touch-sensitive display device , each region of interest (608; 704; 804) including a plurality of display electrodes (206; 302) surrounding the predicted future position (606A, 606C; 702; 802) of a stylus electrode of the two or more stylus electrodes ; and during the future touch-sensing time frame, selectively scan display electrodes in the regions of interest (608; 704; 804), where the regions of interest (608; 704; 804) are identified based at least in part on a known physical structure of the active stylus , the known physical structure being a fixed distance between two of the stylus electrodes of the active stylus . a touch-sensitive display including a plurality of display electrodes (206; 302); a logic machine ; and a storage machine holding instructions executable by the logic machine to: over a series of touch-sensing time frames, interpret electrical conditions of display electrodes (206; 302) of a touch-sensitive display device to estimate frame-by-frame positions of two or more stylus electrodes of an active stylus relative to the touch-sensitive display device ; based on the estimated frame-by-frame positions of the stylus electrodes , predict future positions (606A, 606C; 702; 802) of each of the two or more stylus electrodes during a future touch-sensing time frame; identify regions of interest (608; 704; 804) on the touch-sensitive display device , each region of interest (608; 704; 804) including a plurality of display electrodes (206; 302) surrounding the predicted future position (606A, 606C; 702; 802) of a stylus electrode of the two or more stylus electrodes ; and during the future touch-sensing time frame, selectively scan display electrodes in the regions of interest (608; 704; 804), over a series of touch-sensing time frames, interpret electrical conditions of display electrodes (206; 302) of a touch-sensitive display device to estimate frame-by-frame positions of two or more stylus electrodes of an active stylus relative to the touch-sensitive display device ; based on the estimated frame-by-frame positions of the stylus electrodes , predict future positions (606A, 606C; 702; 802) of each of the two or more stylus electrodes during a future touch-sensing time frame; identify regions of interest (608; 704; 804) on the touch-sensitive display device , each region of interest (608; 704; 804) including a plurality of display electrodes (206; 302) surrounding the predicted future position (606A, 606C; 702; 802) of a stylus electrode of the two or more stylus electrodes ; and during the future touch-sensing time frame, selectively scan display electrodes in the regions of interest (608; 704; 804), where the regions of interest (608; 704; 804) are identified based at least in part on a known physical structure of the active stylus , the known physical structure being a fixed distance between two of the stylus electrodes of the active stylus . <EOS>