Canon POWERSHOT D20 User Manual page 42

Editing Still images
_'Correct_ng l_age Brightness (_-Contrast)
Excessively dark image areas (such as faces or backgrounds) can be
detected and automatically adjusted to the optimal brightness. Insufficient
overall image contrast is also automatically corrected, to make subjects stand
out better. Choose from four correction levels, and then save the image as a
separate file.
Choose [{-Contrast].
Press the MFNU button, and then choose
[i=Contrast] on the DE] tab (p. 42).
Choose an image.
Press the 4_ buttons to choose an image,
and then press the _ button.
Choose an option.
Press the 4_ buttons to choose an option,
and then press the _ button.
Save as a new image and review.
Follow steps 4 = 5 on p. 146.
(_ For some images, correction may be inaccurate or may cause
images to appear grainy.
Images may look grainy after repeated editing using this function.
_ [Low], [Medium], or [High].
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