Choose the roles played by the [Fn] buttons.
Display the shooting menu and select [FUNCTION (Fn) SETTING].
Press the selector up or down to highlight the desired button and press [MENU/OK] to select. You will be given the following choice of functions to assign to the selected button.
Select [NONE] to assign no function to the selected button.
Highlight the desired function and press [MENU/OK] to assign it to the selected button.