To assign roles to the function buttons, press and hold the DISP/BACK button until the menu below is displayed. Select buttons to choose their roles.
The options available include:
To disable the selected button, choose NONE.
You can also display options for any of the function buttons by pressing and holding the button. This does not apply to buttons to which FOCUS CHECK, AE LOCK ONLY, AF LOCK ONLY, or AE/AF LOCK are currently assigned.
The roles played by the six function buttons can also be selected using BUTTON/DIAL SETTING > FUNCTION (Fn) SETTING.
If TTL-LOCK is selected, you can press the control to lock flash output according to the option selected for FLASH SETTING > TTL-LOCK MODE.
If MODELING FLASH is selected when a compatible shoe-mounted flash unit is attached, you can press the control to test-fire the flash and check for shadows and the like (modeling flash).