HP R818 - Manual (Page 73)

73 Taking Pictures and Recording Video Clips
If the new setting is anything other than the default, the icon
for the setting appears in the Live View screen.
The White Balance setting remains in effect until it is changed
again, or until you turn the camera off. To save changed
settings, use My Mode (see page 56).
Manual White Balance
If you select Manual, the Manual
White Balance screen displays. The
Live View portion of the screen
shows the color tint from the
previous Manual White Balance
setting.
To change the Manual White Balance setting:
1. Point the camera at a white or gray target (such as a
piece of paper), making sure that the entire screen
encompasses the white or gray target.
2. Press the Shutter button (the camera will not take a
picture). The camera calculates a custom White Balance
setting.
3. If needed, repeat steps 1 and 2 until you get the desired
Manual White Balance setting.
4. When you are satisfied with the Manual setting you have
made, press to save the setting.
TIP: To restore the previous Manual White Balance setting,
press without pressing the Shutter button.