Canon EOS 5DS R Instruction Manual - Page 59

Basic Operation R Multi Function Lock By setting [83: Multi function lock] (p.410) and moving the switch to the right, you can prevent the Main Dial, Quick Control Dial, and Multi-controller from moving and changing a setting inadvertently. switch set to the left: Lock released switch set to the right: Lock engaged If the switch is set to the right and you try to operate any of the locked camera controls, will appear in the viewfinder and on the LCD panel. Also, [LOCK] will appear on the Quick Control screen (p.60). U LCD Panel Illumination You can illuminate the LCD panel by pressing the button. Turn on (9) or off the LCD panel illumination by pressing the button. During a bulb exposure, pressing the shutter button completely will turn off the LCD panel illumination. 59