A display apparatus that displays handwritten data includes a display, a memory, and a processor configured to execute receiving as input the handwritten data; detecting one or more secondary display apparatuses; displaying, in a case where the one or more secondary display apparatuses are detected by the detecting, on the display of the display apparatus, an operation command related to a function of displaying data by using the display apparatus and the one or more secondary display apparatuses, based on the handwritten data received by the receiving; and predetermined processing related to the function, in response to receiving an operation performed by a user with respect to the operation command.