Canon EOS-1DX Af Setting Manualbook page 101

Utilizing the AF point setting and registration
Instantly recalled AF points using
[Switch to registered AF point]
You can press a buttons 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.Fn5: operation]
Using the [Custom Controls] option from the custom
function [C.Fn5: operation] 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.
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