Canon POWERSHOT SD3500 IS Digital ELPH User Manual page 87

Shooting with the AF Lock
Touch operations on faces or subiects appearing outside the border will not
work. They witl work if the face or subject move inside the border.
Shooti.
The focus can be locked. After locking the focus, the focal distance will not
change even when you release your finger from the shutter button.
,I Lock the focus.
Keep the shutter button pressed halfway,
and touch the center of the screen=
The focus locks and
AFL
appears on the
screen=
Bfyou release your finger from the shutter
button and touch the screen again, AF
lock will cancel and
AFL
w i!l disappear,
Compose the scene and shoot.
87