Canon EOS-1D X Mark III Af Setting Manualbook page 100

How can I quickly move the AF
point with a single touch?
You can press a button and instantly
switch between registered AF points.
Store your preferred AF point for
instant access at the touch of a button.
Use [Custom Controls] from [C.Fn6]
Using the [Custom Controls] option from the custom
function [C.Fn6] menu allows an AF point to be registered
and recalled instantly. This function can also be used to
assign various functions to the different camera controls.
Viewfinder shooting only
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