In one example in accordance with the present disclosure, a display device is described. The example display device includes a processor and a memory communicatively coupled to the processor and storing executable instructions that when executed cause the processor to: (1) receive, from a graphics processor of a source device, a screen image for display on the display device; (2) define an image region of the screen image for duplication on a second display device; and (3) send the image region to the second display device.