The present invention relates to a display device and a control method therefor, and the objective of the present invention is to display content on a main screen of the display device, enter a magnification mode according to a magnification mode input request received from a remote control, receive, from the remote control, an input for selecting a specific region from the entire region displayed on the main screen, magnify the selected specific region at a predetermined magnification in correspondence with the received selection input, display the magnified specific region on the main screen, and differently display specific information of the magnified specific region on a PIP screen of the main screen according to the predetermined magnification.