Canon T6i Basic Operating Instructions Manual page 4

● Custom WB Preset
○ For the most accurate white balance, use the custom setting.
■ Take a picture of something white like a piece of paper or a wall in
the area you're shooting and under the lighting you plan to use.
■ Then go to the menu and find custom white balance.
■ Open it and select your white image.
● Then using the quick control button, select the WB setting and
choose the custom white balance.
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