Canon EOS-1D X Mark III Advanced User's Manual page 731

Set-up 3
(1) UI magnification
(2) Help text size
(3) Video system
(4) Touch control
(5) Beep
(6) Battery info.
(7) Sensor cleaning
Set-up 4
(1) HDMI resolution
(2) Save/load cam settings on card
(3) Custom shooting mode (C1-C3)
(4) Reset camera
(5) Copyright information
731