Canon PowerShot SD630 Digital ELPH Digital IXUS 65 Basic User's Manual page 51

Histogram Function
The histogram is a graph that allows you to judge the brightness
of the image. The greater the bias toward the left in the graph,
the darker the image. The greater the bias toward the right, the
brighter the image.
If the image is too dark, adjust the exposure compensation to a
positive value. Similarly, adjust the exposure compensation to a
negative value
if
the image is too bright (p. 51).
Sample Histograms
•
Bright Image Balanced Image Dark Image
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