Press to display the setting screen of the current mode.
Press to turn on illumination.
Press to display the mode selection screen. Hold down for about one second to return to the Timekeeping Mode.
Pressing (C) while a setting screen is displayed will go back one screen.
Pressing in the Timekeeping Mode displays the auto time adjustment selection screen.
Press in any mode to display the navigation screen.
Pressing this switch while a setting screen is displayed applies a selected setting or a setting change.
Rotating this switch while a setting screen is displayed scrolls through available menu items.