Canon PowerShot S400 Digital Elph User Manual page 71

You c an switch between metering modes toshoot.
Appropriate for s tandard shooting conditions,
including backlit scenes. The c amera divides images
Evaluative into several zones forlight metering. Itevaluates
[] Light complex lighting conditions, such as the position ofthe
Meteringsubject, the brightness, the direct light, and t he
backlighting, and a djusts the settings tothe correct
exposure for t he main subject.
Center- Averages the light metered from the entire frame, but
gives greater weight tothe subject matter atthe
[] Weighted center.
Averaging
Spot AE Meters the area within the spot AE point atthe center
ofthe LCD m onitor. Use this mode when the subject is
[] Point backiit orsurrounded by strong light.
• Display I'_1,[] or [].