The present invention relates to a display device and a control method therefor and, more specifically, provides a display device comprising: a sensing unit for sensing a touch pen; a touchscreen; and a control unit, wherein the control unit controls at least one of a plurality of pieces of content on the basis of a position of the touch pen in a state of executing a multi-tasking mode in which the plurality of pieces of content is simultaneously being executed on the touchscreen, the plurality of pieces of content including note content.