Canon EOS-1 D X Mark II Instruction Manual page 204

3 Changing the File Name
Settings
204
Operate the <5>, <6>, or <9> to
move the
character. Then press <0> to enter
it.
To cancel the text entry, press the
<B> button, then select [OK].
Exit the setting.
4
After entering the correct number of
characters, press the <M> button,
then select [OK].
The registered file name will be
saved.
Select the registered file name.
5
Select [File name], then press <0>.
Select the registered file name, then
press <0>.
If User setting2 is registered, select
"*** (the 3 characters registered) +
image size".
and select the desired