Canon EOS-1D X Mark III Advanced User's Manual page 295

3.
Select [On] (
4.
Set the options as desired.
Canon Log
On
Enables 10-bit recording of Canon Log movies to the card. Movies can also be recorded
to an external device that supports 10-bit recording.
).
Set [View Assist.],
space].
[Color Matrix], [Characteristics], and
295
[Color