About The Histogram; Overexposure Warning - Canon PowerShot G6 User Manual

Confirming information on the LCD Monitor (continued)

About the Histogram

The histogram is a graph that allows you to judge the brightness of
the recorded image. The greater the bias toward the left in the
graph, the darker the image. The greater the bias toward to the right,
the brighter the image.
If the image is dark, adjust the exposure compensation to a positive
number. Similarly, adjust the exposure compensation to a negative
number if the image is bright (p. 94).
Sample
Histograms
Dark Image

Overexposure Warning

In the following conditions, overexposed portions of the image blink.
When an image just shot is being reviewed on the LCD monitor
(Information view).
In the detailed display mode of the Playback mode.
40
Balanced Image Bright Image