Canon POWERSHOT SD3500 IS Digital ELPH User Manual page 77

Adjusting the White Balance
You can adjust the white balance to the light source at the shooting Iocation.
Make sure that you set the white balance under the light source of the actual
scene you will shoot.
in Step 2 on p. 76, choose _md.
Make sure the entire screen is filled with a
plain, white colored subject, then touch
_% on the right.
The tint on the screen will change when a
white balance data is set.
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