Sony DCX-930 Operating Instructions Manual page 32

Adjusting the White Balance
Each time the lighting condition changes, you have to
adjust the camera for white balance so that optimal color
reproduction is obtained.
WHITE button
Chapter 3 a
30% of screen height
White object
10% of screen width 10% of screen width
The white object must be within this
rectangle. (Avoid having any very bright
highlights within the rectangle.)
10% of screen height
Chapter3 Shooting | 3-5(E)