Display devices, methods, and programs display an image on a touch panel. The devices, methods, and programs detect a start position, which is a detected position where a user's finger starts to contact the touch panel, calculate a moving amount by multiplying a distance between the detected start position and a detected second position of the user's finger by a predetermined coefficient of less than one, and update the display position of the image in a direction moving from the detected start position toward the detected second position until the moving amount is equal to or less than a minimum moving amount.