A transmitter configured to transmit a measurement signal of a measured physical amount in a process control system, comprising: a display portion, wherein setting items for the transmitter and setting values of the setting items are displayed on the display portion, the setting items including a setting item for adjusting a process value of the process control system; a first input receiver configured to receive a first selecting operation for selecting one of the setting items and a second selecting operation for selecting one of the setting values; a second input receiver configured to receive a switching operation for sequentially switching the setting values of the setting item which is selected by the first selecting operation in response to a rotation direction of the second input receiver; and a first controller configured to display the setting values of the selected setting item on the display portion such that the setting values are sequentially switched in response to the switching operation received by the second input receiver, wherein the second input receiver is configured to be rotated in a first rotation direction or in a second rotation direction opposite to the first rotation direction, and wherein the first controller is configured to: i) display the setting values of the selected setting item on the display portion such that the setting values are sequentially switched in a forward direction when the second input receiver is rotated in the first rotation direction by the switching operation; and ii) display the setting values of the selected setting item on the display portion such that the setting values are sequentially switched in a backward direction when the second input receiver is rotated in the second rotation direction by the switching operation. a display portion, wherein setting items for the transmitter and setting values of the setting items are displayed on the display portion, the setting items including a setting item for adjusting a process value of the process control system; a first input receiver configured to receive a first selecting operation for selecting one of the setting items and a second selecting operation for selecting one of the setting values; a second input receiver configured to receive a switching operation for sequentially switching the setting values of the setting item which is selected by the first selecting operation in response to a rotation direction of the second input receiver; and a first controller configured to display the setting values of the selected setting item on the display portion such that the setting values are sequentially switched in response to the switching operation received by the second input receiver, wherein the second input receiver is configured to be rotated in a first rotation direction or in a second rotation direction opposite to the first rotation direction, and wherein the first controller is configured to: i) display the setting values of the selected setting item on the display portion such that the setting values are sequentially switched in a forward direction when the second input receiver is rotated in the first rotation direction by the switching operation; and ii) display the setting values of the selected setting item on the display portion such that the setting values are sequentially switched in a backward direction when the second input receiver is rotated in the second rotation direction by the switching operation. i) display the setting values of the selected setting item on the display portion such that the setting values are sequentially switched in a forward direction when the second input receiver is rotated in the first rotation direction by the switching operation; and ii) display the setting values of the selected setting item on the display portion such that the setting values are sequentially switched in a backward direction when the second input receiver is rotated in the second rotation direction by the switching operation.