Canon POWERSHOT SX100 IS User Manual page 18

Shooting Using the Mode Dial I 85
_p Program AE []
See Functions Available in Each Shooting Mode (p. 222).
The camera automatically sets the shutter speed and aperture value to
match the brightness of the subject. You can freely configure such
settings as the ISO speed, exposure compensation and white balance.
[_] hen a correct exposure cannot be obtained, the shutter
speed and aperture values are shown in red on the LCD
monitor when the shutter button is pressed halfway. Use the
following shooting methods to obtain the correct exposure and
make them show in white.
- Using the flash (p. 65)
- Changing the ISO speed (p. 110)
- Changing the metering method (p. 115)