Nikon D5 100th Anniversary Edition User Manual - Page 366

d9: LCD Illumination G button ➜ A Custom Settings menu If Off is selected, the control panel and button backlights (illuminators) will only light while the power switch is rotated toward D. If On is selected, the backlights will remain on while the standby timer is active (0 41). Regardless of the option selected, the backlights turn off when the shutter-release button is pressed; if On is selected, they will come back on when you lift your finger from the shutter-release button. Select Off for increased battery life. A Button Backlights I button BKT button Release mode dial pointer Y button O (Q) button K button G button L (Z/Q) button X button W (M) button J button Fn3 button S button T button a button R button U button U 342