Broadcasting display device and control method thereof

PURPOSE: A broadcast display device and a controlling method are provided, which make movement or selection between a plurality of application windows by adjusting a size and location of a plurality of application window according to a preset pattern. CONSTITUTION: A broadcasting display device(100) comprises a display unit(110) and a control unit(120). The display unit displays a plurality of application windows in one screen. The control unit displays a preset identifier in each of a plurality of application windows. The control unit controls the movement and display of present application window in pattern capable of easy selection through the display unit, if an event occurs.