A method and display device for displaying images are discussed. According to an embodiment, there is a method for displaying images using a display device, the display device including a memory, a display screen, and a controller for controlling the memory and the display screen, the method comprising: storing, in the memory, channel information pertaining to a predetermined number of broadcast channels; and displaying, on the display screen, a multi-window including a plurality of sub-windows, each of the plurality of sub-windows configured to display images from a different one of the broadcast channels, wherein a number of the sub-windows displayed on the display screen is variable according to the channel information.