1. A method of operating a display device, the method comprising: displaying a first image of first content, wherein the first image includes a target object; receiving information on a second coordinate of the target object included in a second image of the first content from a second display device, wherein the second image is temporally later than the first image; acquiring an image tracking the target object from the second image based on the information on the second coordinate of the target object; and displaying the acquired image.