Canon Powershot A480 User Manual page 42

Information Displayed on the Screen
Display in Dark Conditions during Shooting
The display automatically brightens when shooting in dark conditions,
allowing you to check the composition (Night Display function). However, the
brightness of the image on the screen, and the brightness of the actual
image recorded may be different. Screen noise may appear and the
movement of the subject may appear somewhat jagged on the screen. This
has no effect on the recorded image.
Overexposure Warning during Playback
In "Detailed Information Display" (p. 41), overexposed areas of the image
flash on the screen.
Histogram during Playback
Dark Bright
42
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The graph that appears in "Detailed
High
Information Display" (p. 41) is called the
histogram. The histogram shows the
distribution and amount of brightness of
Low
an image. When the graph approaches
the right side, the image is bright, but
when it approaches the left side, the
image is dark, and in this way you can
judge the exposure.