Canon EOS 1200D Basic Instruction Manual page 74

Using AF to Focus (AF Method)
Quick Mode:f
The dedicated AF sensor is used to focus in One-Shot AF, using the
same AF method as with viewfinder shooting.
Although you can focus on the target subject quickly, the Live View
image will be interrupted momentarily during the AF operation.
You can use nine AF points to focus (automatic selection). You can also
select one AF point to focus and focus only the area covered by that AF
point (manual selection).
AF point
Magnifying frame
74
Display the Live View image.
1
Press the <A> button.
The Live View image will appear on
the LCD monitor.
The small boxes on the screen are
the AF points, and the larger box is
the magnifying frame.
Select the AF point.N
2
Press the <Q> button (7) to
display the Quick Control screen.
The settable functions will be
displayed on the left of the screen.
Press the <W> <X> keys to make the
AF point selectable.
Turn the <6> dial to select the AF
point.