Canon EOS R5 Mark II Advanced User's Manual page 976

4.
Enter letters and numbers of your choice.
Enter four characters for User setting 1 or three for User setting 2.
By selecting [
To delete single characters, select [
Use the <
press <
5.
Exit the setting.
Press the <
], you can change the input mode.
> or < > dial or <
> to enter it.
> button, then press [OK].
976
] or press the <
> to select a character, then
> button.