Canon A2000 IS - Manual (Page 87)

87
Just like with AE lock (p. 85) , you can lock the exposure for shooting with the
flash.
Select (p. 59) .
Lock the Flash Exposure.
● Point the camera at the subject on which
you wish to lock the exposure. While
pressing the shutter button halfway
,
press the o button .
X The flash fires and displays. The flash
output is retained.
Compose the scene and shoot.
● After shooting, press the o button to
cancel FE lock.
(
Shooting with FE Lock