Canon PowerShot SD10 (PC1060) User Manual page 78

Using the Exposure Compensation
This camera automatically adjusts the exposure to shoot images with the
optimal brightness. However, recorded images may sometimes be
brighter or darker than the actual image depending on the shooting
conditions. If this happens, adjust the exposure compensation manually.
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Underexposure
The whole recorded image is dark, which
makes white elements of the image appear
gray. Shooting bright subjects or in backlit
conditions may cause the image to be
underexposed. Adjust the exposure
compensation towards the + end.
Optimal Exposure
Overexposure
The whole recorded image is bright, which
makes black elements of the image appear
gray. Shooting dark subjects or in dark
places may cause the image to be
overexposed. Adjust the exposure
compensation towards the - end.