Provided are an electronic apparatus and method of operating the electronic apparatus. The electronic apparatus includes a display; a touch input interface comprising touch input interface circuitry; a memory configured to store instructions; and a processor configured to execute instructions stored in the memory, wherein the processor is configured to execute instructions to: control the display to output a screen of an external device to at least a portion of the display by mirroring the external device, recognize the touch input as a drawing input or an external device control input for controlling the external device based on a thickness of the touch input and control the display to output drawing data or control the external device.