Canon EOS-1D X Mark III Advanced User's Manual page 857

Shutter speed
setting in M mode
Aperture setting
in M mode
Movies
Function
Pause Movie
Servo AF
Start movie
recording (when
set)
Image
Function
Image size
selection
One-touch image
quality setting
One-touch image
quality (hold)
Record function
and card/folder
select
Picture Style
selection
White balance
selection
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