A control method comprising controlling, with an electronic processor, a display unit to display identifiers that correspond to a plurality of imaging devices, receiving, with the electronic processor, a display instruction to display one or more operational instructions while controlling the display unit to display the identifiers that correspond to the plurality of imaging devices, the one or more operational instructions are shared in common among the plurality of imaging devices, controlling, with the electronic processor, the display unit to display the one or more operational instructions in response to receiving the display instruction, receiving, with the electronic processor, a user operation that selects one operational instruction from the one or more operational instructions while controlling the display unit to display the one or more operational instructions, and controlling, with the electronic processor, a communication interface to transmit the one operational instruction to the plurality of imaging devices in response to receiving the user operation.