Canon EOS-1D X Mark III DSLR Camera (Body Only) - Manual (Page 129)

Custom White Balance
Registering Custom White Balances
Selecting and Shooting with Custom White Balances
Naming Custom White Balances
With custom white balance, you can manually set the white balance for the specific light
source of the shooting location. Make sure to perform this procedure under the light source
at the actual location of the shoot.
Up to five custom white balances can be registered to the camera. You can also add a name
(caption) to registered custom white balances. Register separate ones for still photos and
movies, as needed.
Registering Custom White Balances
To register custom white balances, you can either register a picture taken during this
process or register an image recorded on a card.
Shooting and registering white balances
1.
Select [ : Set Custom WB].
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