Manual White Balance - Sony FS5 Quick Start Manual

Manual White Balance
The camera will White Balance in FULL AUTO Mode but
Manual White Balance is preferable. The WHT BAL button toggles
between manual and auto white balance.
To do a manual white balance, set the WHIT BAL switch on the side of
the camera to either A or B (you can store two manual WB settings).
Point the camera at a white card with light falling on it.
Press the WB SET button on the front of the camera.
The Preset Switch is controlled by the Camera Menu:
CAMERA PAINT/WB PRESET. There are indoor/outdoor and color
temperature presets.
Manual White Balance does not work in SLOG. The white balance is
set in the SLOG Picture Profile settings.