Canon EOS M50 Mark II Advanced User's Manual page 230

2.
Set the white balance correction.
Sample setting: A2, G1
Press the <
preferred position.
B is for blue, A for amber, M for magenta, and G for green. White
balance is corrected in the direction you move the mark.
On the right of the screen, [Shift] indicates the direction and correction
amount, respectively.
Pressing the <
settings.
Press <
Note
One level of the blue/amber correction is equivalent to approx. 5 mireds of a color
temperature conversion filter. (Mired: Unit of measure for color temperature used to
indicate values such as the density of a color temperature conversion filter.)
>< > or <
> button will cancel all the [WB Shift/Bkt.]
> to exit the setting.
230
>< > keys to move the ■ mark to your