Canon EOS-1D X Mark III DSLR Camera (Body Only) - Manual (Page 812)

Custom Shooting Mode (C1–C3)
Automatic Update of Registered Settings
Canceling Registered Custom Shooting Modes
You can register current camera settings such as shooting, menu, and Custom Function
settings as Custom shooting modes assigned to <
> to < > modes. You can register
different functions to use when shooting still photos or movies.
To use <
> or < >, first enable < > and < > in [ 3 : Restrict shooting
modes ] ( ).
1.
Select [ : Custom shooting mode (C1-C3)].
2.
Select [Register settings].
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