Pentax OPTIO 33L Operating Manual page 42

Select [_] (Manual) on the White
Balance selection screen.
Point your camera at white paper to
fill the screen.
Press the OK button. _Ex_
_,o_
The LCD monitor will display "Adjusting", and return to the menu
screen when the white balance is adjusted.
Press the OK button.
The camera is ready to take a picture.
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