Canon EOS-1D X Mark III Advanced User's Manual page 243

4.
Focus on the subject.
When you press the shutter button halfway, the camera will focus with
the current AF method (
You can also tap the screen to select the face or subject.
5.
Take the picture.
Press the shutter button completely.
Press the <
Caution
Live View images viewed outdoors on a sunny day may look different from the
actual brightness and mood of your shots. For image display unaffected by ambient
light, set the brightness in [ : Disp. brightness] to level 4.
).
> button to exit Live View shooting.
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