Canon A3350 IS - Manual (Page 109)

109
You can lock the exposure or change it in 1/3 steps within a range of ±2
before shooting.
Focus.
z Press the shutter button halfway to focus.
Lock the exposure.
z After releasing the shutter button, press
the
o button to lock the exposure. The
exposure shift bar appears.
z Press the o button again to release the
lock.
Change the exposure.
z While watching the screen, press the qr
buttons to adjust the exposure.
Shoot.
AE Lock/Exposure Shift