A method of displaying for allowing a plurality of application windows to be easily controlled and a display device therefor are provided. A method of displaying a screen on a display device includes displaying a button on a touch screen; splitting the touch screen into a plurality of regions based on the position at which the button is displayed, receiving a touch input to move a displayed button, obtaining a slope value of a line connecting a start point of the touch input to an end point thereof, selecting a region corresponding to the slope value from among the plurality of regions split, and moving the button to a certain position included in a selected region.