Canon MARK III EOS-1 DS Instruction Manual page 66

O Custom White Balance
[Register image on card]
First follow step 4 under [Record and register image] to take a
picture of a plain, white object. This image saved in the memory
card can then be registered for Custom WB. The procedure up to
step 2 is the same as with [Record and register image].
66
Select [Custom WB regist.].
1
Select the Custom WB No. to be
2
registered.
Select [Register image on card].
3
Turn the <5> dial to select [Register
image on card], then press <0>.
The images saved in the memory
card will be displayed.
Select the image to be used for
4
registrating the Custom WB data.
You can also display a four- or nine-
image index by pressing the <y>
button.
Turn the <5> dial to select the
image to be registered for the Custom
WB data, then press <0>.
Select [OK].
5
Turn the <5> dial to select [OK],
then press <0>.
The Custom WB data will be registered,
and a message will be displayed. Press
<0> to return to step 3.
To use the registered Custom WB
data, see "Selecting and Shooting
with the Custom WB data" (p.67).