Pentax K-r Operating Manual page 64

Under the light to measure the white balance, fully display
a white sheet of paper in the viewfinder or select a white
area as the subject.
Press the shutter release button fully.
Set the focus mode lever to MF when the shutter cannot be released.
The screen to select the measuring range is displayed.
Use the e-dial to select the entire _o
screen or spot area for the
measuring range.
When a spot area is selected, use
the four-way controller (A • 4 • )
to move the frame to the position
you want to measure.
0
Press the
OK
button.
IManual
|White Balance
The white balance fine-tuning
screen _l_Adjust
appears when measuring is completed.
Adjust the white balance as necessary.
(p.204) _ __+o_
°1
7
l Press the
OK
button.
The camera returns to the [White Balance] screen.