Canon EOS M Instruction Manual page 121

When the camera does not focus the desired target subject with
automatic AF point selection, switch the AF method to zone selection or
[FlexiZone - Single], and refocus.
Depending on the aspect ratio setting, the number of AF points will differ.
At [3:2], there will be 31 AF points. At [1:1] and [4:3], there will be 25 AF
points. And at [16:9], 21 AF points. Also, at [16:9], there will be only three
zones.
For movie shooting, there will be 21 AF points (or 25 AF points if
[640x480] is set) and three zones (or 9 zones if [640x480] is set).
FlexiZone - Single: d
Since only one AF point is used to focus, you can focus the target subject. Since only one AF point is used to focus, you can focus the target subject. Since only one AF point is used to focus, you can focus the target subject.
AF point AF point AF point
1
Move the AF point. Move the AF point. Move the AF point.
Tap the screen where you want to Tap the screen where you want to Tap the screen where you want to
focus to move the AF point. (It cannot focus to move the AF point. (It cannot focus to move the AF point. (It cannot
go to the edges of the picture.) To go to the edges of the picture.) To go to the edges of the picture.) To
return the AF point to the center,
press the <XL> button.
2
Focus the subject.
Aim the AF point over the subject and
press the shutter button halfway.
X When focus is achieved, the AF point
turns green and the beeper sounds.
(If [AF operation] has been set to
[Servo AF], the AF point remains
white and the beeper will not sound.)
X If focus is not achieved, the AF point
will change to orange.
3
Take the picture.
Press the shutter button completely
(p.67).
Changing the Focusing Method
121