Canon POWERSHOT SD3500 IS Digital ELPH User Manual page 90

You can lock the exposure and shoot, or set the focus and exposure
separately to shoot. AE stands for "Auto Exposure"
;I Lock the exposure.
Point the camera toward the subject and
touch the bottom part of the screen (inside
the frame shown on the left) wMle
pressing the shutter button halfway.
When
AEL
appears, the exposure will be
locked.
Bfyou release your finger from the shutter
button and touch the screen again,
AEL
w ill
cancel, and
AEL
will disappear.
_ Compose the scene and shoot.
Just as with the AE lock (above), you can lock the exposure for shooting with
the flash. FE stands for "Flash Exposure".
....Choose (p.71).
2 Lock the flash exposure.
........ Point the camera toward the subject and
touch the bottom part of the screen (inside
the frame shown on the left) while
pressing the shutter button halfway=
The flash wil! fire and when
FEL
appears,
the flash output will be retained.
Bfyou release your finger from the shutter
button and touch the screen again, EELwill
disappear.
Compose the scene and shoot.
90