Canon POWERSHOT A1100IS User Manual page 79

You can select a specific person's face to focus on and then shoot.
;: Set the Face Select mode.
Point the camera toward the face and
press the [_J] button.
After [Face Select : On] displays, a face
frame [r ÷ will appear around the face
detected as the main subject.
Even if the subject moves, the _ will
follow the subject within a certain range.
If a face is not detected, ' _ will not
appear.
Select the face on which to focus.
If you press the L_Jbutton, will move to
another detected face.
When the frame has made a full circuit of
all detected faces, [Face Select : Off] will
appear and the AF frame mode screen will
reappear.
.... Shoot.
Press the shutter button halfway. The face
frame of the selected face will change into
a green _.
Press the shutter button fully to shoot.
Keeping the _J] button pressed will display the number of faces detected by the
camera (35 at the most) (green: main subject's face, white: detected face).
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