Method for supporting user input and electronic device supporting the same

An electronic device, comprising:

• a housing;
• a touchscreen display, at least part of which is exposed through a first region of the housing;
• a wireless communication circuit;
• a connector, at least part of which is exposed through a second region of the housing;
• and
• a processor electrically connected to the touchscreen display, the wireless communication circuit, and the connector,
• wherein the processor is configured to:
• connect to an external display device via the wireless communication circuit or the connector;
• display a graphical user interface corresponding to a screen, which the external display device outputs, in at least part of a region of the touchscreen display;
• display at least part of a region of the graphical user interface in a black background;
• and
• convert first coordinate information of a user input, which is received with respect to at least one region of the graphical user interface, to second coordinate information corresponding to the external display device to transmit the second coordinate information to the external display device.

A user input supporting method of an electronic device, the method comprising:

• connecting to an external display device;
• displaying a graphical user interface corresponding to a screen, which the external display device outputs, in at least part of a region of touchscreen display that the electronic device includes;
• displaying at least part of a region of the graphical user interface in a black background;
• and
• converting first coordinate information of a user input, which is received with respect to at least one region of the graphical user interface, to second coordinate information corresponding to the external display device to transmit the second coordinate information to the external display device.