Canon EOS M Instruction Manual page 68

A Fully Automatic Shooting (Scene Intelligent Auto)
FAQ
The AF point does not turn green and focus is not achieved.
Try again, aiming the AF point at an area with a good bright/dark
contrast, then press the shutter button halfway. Also, focus might not
be achieved if you are too close to the subject. Move away from the
subject and shoot.
Multiple AF points appear in green.
Focus has been achieved at all the green AF points. When the AF
point covering the desired subject turns green, take the picture. point covering the desired subject turns green, take the picture. point covering the desired subject turns green, take the picture.
Pressing the shutter button halfway does not focus the subject. Pressing the shutter button halfway does not focus the subject. Pressing the shutter button halfway does not focus the subject.
When an EF or EF-S lens is used, if the focus mode switch on the When an EF or EF-S lens is used, if the focus mode switch on the When an EF or EF-S lens is used, if the focus mode switch on the
lens is set to <MF> (manual focus), manual focusing will be in effect.
Set the focus mode switch to <AF> (autofocus).
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> (manual focus), manual focusing will be in effect. > (manual focus), manual focusing will be in effect.
> (autofocus). > (autofocus).