An electronic device having an electronic board function and an operation method thereof. The electronic device includes: a display; a touch input interface; a memory storing at least one instruction; and a processor configured to execute the at least one instruction stored in the memory to: display a writing area in a display area of the display; detect a predefined touch input in the writing area; and based on detecting the predefined touch input, reduce the writing area, display the reduced writing area in at least first part of the display area and provide an extended area in at least second part of the display area, the extended area being configured to receive a writing input continuing from the reduced writing area to the extended area.