Fahrenheit to Celsius

[Rousset]

I have a brand new Samsung Bespoke fridge. Model  RF29BB8600QLAA. How do I change the temperature unit to Celsius? None of the suggestions I read so far worked. 

[GaryB82]

page 40 of the owners manual says 

You can also use the Freezer button to switch the temperature
scale between Celsius and Fahrenheit. To switch the temperature
scale, press and hold Freezer for 3 seconds to change the current
temperature scale.