According to an embodiment, a processor of a wearable device is configured to identify, based on an image output from a camera, an external electronic device. The processor, based on the identification, is configured to request outputting of an optical signal to the external electronic device through a communication circuit. The processor is configured to identify, in a portion of the image where the external electronic device is displayed, a position of the optical signal output from the external electronic device. The processor is configured to control a display to display a visual object having an extended shape based on the identified position in the display.