Canon POWERSHOT SX100 IS User Manual page 56

Various Shooting Methods 1123
_ Setting the Flash Output []
See Functions Available in Each Shooting Mode (p. 222).
When shooting, the flash output can be controlled in three steps, up to
FULL.
In TV and AM shooting modes, please set [Flash Adjust] to [Manual].
1. Press the _ button.
2. Use the _ or 41,button to select []
and the ÷ or ,_ button to change the
option.
3. Press the _u_ button.
W
Flash Output