Movie Shooting - Canon EOS 5D MARK IV Instruction Manual

Focusing with AF (AF Method)
If the camera does not focus the desired target subject with automatic
selection, switch the AF method to zone selection or [FlexiZone -
Single] (p.321) and refocus.
With Live View shooting, the number of AF points will differ depending on
the [z5: Aspect ratio] setting. When the aspect ratio is [3:2], [4:3], or
[16:9], there will be 63 AF points and 9 zones. For [1:1], 49 AF points
and 9 zones.
For movie shooting, the number of AF points and zones will differ
depending on the [Movie recording size] setting. With Lw
shooting, there will be 63 AF points and 9 zones. For H shooting, 15 AF
points and 3 zones.
320
Focus on the subject.
3
Aim the AF point over the subject and
press the shutter button halfway.
When focus is achieved, the AF point
will turn green and the beeper will
sound.
If focus is not achieved, the area
frame will turn orange.
Take the picture.
4
Check the focus and exposure, then
press the shutter button completely to
take the picture (p.298).