Canon PowerShot SX400 IS Black Manual (en)

If [Raise the flash] is displayed, 
lift the flash with your finger to 
prepare it for use. If you prefer not 
to use the flash, push it down with 
your finger, into the camera.
2) Shoot.
Press the shutter button all the 
way down.
As the camera shoots, a shutter 
sound is played, and in low-light 
conditions when you have raised 
the flash, it fires automatically.
Keep the camera still until the 
shutter sound ends.
After displaying your shot, the 
camera will revert to the shooting