Canon EOS-1D X Mark III Af Setting Manualbook page 81

Setting [Initial Servo AF pt,
makes it easier to start tracking the
subject.
When [Initial AF pt set for
tab [Initial Servo AF pt,
AF point manually selected during [
[Auto selection AF] (P. 105). This setting is effective when
there are multiple people in the scene and you want to
start tracking from the target person, or when you want
to start tracking from a non-face part or the subject.
/
/ ] is selected in the [AF5]
/ ], tracking starts from the
+ Tracking AF] or
The [Initial Servo AF pt,
] setting is effective when
you want to start tracking
the target person when there
are multiple people.
81
]
/