Canon EOS 7D Mark II (G) Instruction Manual page 303

If the camera does not focus on the desired target subject with automatic
AF point selection, select a zone or switch the AF method to [FlexiZone
- Single] and refocus.
Depending on the [z5: Aspect ratio], the number of AF points varies.
At [3:2], there are 31 AF points. At [4:3] and [1:1], there are 25 AF points.
And at [16:9], 21 AF points. Also, at [16:9], there are three zones.
For movie shooting, there are 21 AF points (or 25 AF points if [640x480]
is set) and three zones (or nine zones if [640x480] is set).
Take the picture.
4
Check the focus and exposure, then
press the shutter button completely to
take the picture (p.286).
Using AF to Focus (AF Method)
303