Canon IXUS 120 IS - Manual (Page 87)

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The camera can detect areas in the scene, such as faces or backgrounds,
that are too bright or dark and automatically adjust them to the optimum
brightness when shooting. Also, when the overall image is lacking in
contrast, the camera will automatically correct the image for a sharper
impression when shooting.
Choose [i-Contrast].
● Press the n button, choose the 4
tab, and then choose the [i-Contrast]
menu item. Use the
qr buttons to choose
[Auto].
X @ will appear on the screen.
Correcting the Brightness and Shooting
(i-Contrast)
Under some conditions, the image may appear coarse or may not be
corrected properly.
You can correct recorded images (p. 124) .