Canon EOS REBEL T6i Instruction Manual page 105

Selecting the AF Area Selection Mode
AF area selection mode
Under [54: Custom Functions (C.Fn)], if you set [5: AF area selection
method] to [1: j9Main Dial], you can select the AF area selection mode
by pressing the <S> or <B> button, then turning the <6> dial (p.340).
S Selecting the AF Area and AF PointK
Press the <S> or <B> button
1
.
(9)
Look through the viewfinder and

press the <S> or <B> button.
Press the <B> button.
2
Each time you press the <B>

button, the AF area selection mode
changes.
The AF area selection mode currently

set is indicated on the top of the
viewfinder.
h: Single-point AF
(Manual selection)
q: Zone AF
(Manual selection of zone)
r: 19-point automatic selection
AF
105