According to an example embodiment, a method and device for controlling a screen displayed on a display is provided. The method includes: based on a layout of a split screen displayed on the display, verifying a trigger region in the split screen; based on a first input controlling a handle region of a pop-up window displayed on an upper layer of the split screen, detecting that at least a portion of the trigger region is overlaid with the pop-up window; changing the layout of the split screen based on at least one of a position of the portion of the trigger region overlaid with the pop-up window, a relative position of the handle region and a divider of the layout; and displaying a region in the split screen in which the pop-up window is to be arranged.