Canon EOS-1D X Mark III Advanced User's Manual page 846

C.Fn7
switching (
: Enable
: Disable
When set to [Disable
< > does not enable movie recording. This enables still photo shooting at all times.
Smart controller
Enables you to move AF points by dragging on the smart controller after pressing the
< > button.
ON: Enable
Enables use of the smart controller in both vertical and horizontal shooting.
: Disable vertical
Restricts available smart controllers to the smart controller for horizontal shooting.
OFF: Disable
Disables the smart controller.
Caution
This function is not available if you have set the [
Custom Controls.
Note
With [Enable] or [Disable vertical
button to adjust sensitivity, which changes the amount of AF point movement in
response to dragging on the smart controller.
/ )
/
], setting the Live View shooting/Movie shooting switch to
only
] button to [Disable] using
only] selected, you can press the <
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