Canon PowerShot SX400 IS Black Manual (en)

Shooting with the FE Lock
 Still Images 
Just as with the AE lock (
= 102), you can lock the exposure for the 
flash shots.
Lift the flash and set the flash 
to [ ] (= 119).
Lock the flash exposure.
Aim the camera at the subject to 
shoot with the exposure locked. 
With the shutter button pressed 
halfway, press the [
] button.
The flash fires, and when [ ] is 
displayed, the flash output level is 
To unlock FE, release the shutter 
button and press the [
] button 
again. In this case, [
] is no 
longer displayed.
Compose the shot and shoot.
FE: Flash Exposure