Canon EOS R5 C User Manual page 184

Shooting and registering white balances
1.
Press the <
2.
Select the white balance item.
3.
Select [Record and register WB].
> button.
Turn the < > dial or press <
Turn the < > or <
[ ], then press the <
> up or down for selection.
> dial or press <
> button.
184
> left or right to select