Canon EOS 7D Mark II Basic Instruction Manual page 50

Basic Operation
AF Area Selection Lever
p
The <p> lever can be tilted to the right. Use it to select the AF area
selection mode.
You can also press the <S> button and then press the <B> button to
select the AF area selection mode.
Multi-controller
9
The <9> consists of an eight-direction key and a button at the center.
50
After pressing the <S> button,
tilt the <p>.
Pressing the <S> button will make
the AF area selection mode and AF
point selectable for 6 sec. (9).
Then, when you tilt the <p> to the
right within that time, you can change
the AF area selection mode.
Use it to select the AF point, correct
the white balance, move the AF point
or magnifying frame during Live View
shooting, scroll around magnified
images during playback, operate the
Quick Control screen, etc.
You can also use it to select and set
menu items.
For menus and Quick Control, the
Multi-controller works only in the
vertical and horizontal directions
<V> <U>. It does not work in
diagonal directions.