Canon PowerShot SD100 User Manual page 41

The following information may also be displayed with some images.
A sound file in a format other than the WAVE format is attached or the
file format is not recognized.
JPEG file with format not conforming to Design rule for Camera File
System Standards
RAW format file
File with unrecognized format
The image information may not display correctly if images shot with
this camera are replayed on other cameras or images from other
cameras are replayed on this camera.
Histogram Function
The histogram is a graph that allows you to judge the brightness of the
recorded image. The greater the bias toward the left, the darker the
image. The more it trends to the right, the brighter the image. If the
image is dark, adjust the exposure to a positive value. Similarly, adjust
the exposure to a negative value to darken a bright image (p. 82).
Histogram Examples
Dark Image Balanced Image Bright Image
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