xLocking the menus and controls
You can lock the control of buttons to prevent accidental adjustments or resetting.
1Press the m/M buttons to select 
(MENU LOCK) and press the OK button.
The MENU LOCK menu appears on the screen.
2Press the m/M buttons to select ON or OFF and press the OK button.
•ON: Only the 1 (power) switch will operate. If you
attempt any other operation, the 
(MENU LOCK) icon appears on the screen.
•OFF:Set 
(MENU LOCK) to OFF. If you set the 
(MENU LOCK) item to ON, only this menu item can be selected.
15 (GB)