Canon EOS R3 Advanced User's Manual page 433

3.
Aim the camera at the subject.
A tracking frame is displayed around their eye.
To choose an eye to focus on when [
area AF], press the <
[
again to [
You can also tap the screen to choose an eye, when [
set to [Whole area AF] or during tracking in progress.
If your selected eye is not detected, an eye to focus on is selected
automatically.
4.
Take the picture.
Caution
Subject eyes may not be detected correctly, depending on the subject and shooting
conditions.
No tracking frame is displayed when [
regardless of the [
Eyes are not detected when [
], then use < >. As you use <
].
: Subject to detect] setting.
: Subject to detect] is set to [None].
433
: AF area] is set to [Whole
> button to change the tracking frame to
>, the tracking frame changes
: Subject tracking] is set to [Off],
: AF area] is