How do I print with a 0.2mm or 0.6mm nozzle?

I can’t seem to change the nozzle diameter in Up Studio 2 and 3 to anything but 0.4mm. This is strange, given that the Tiertime Shop (where I got my nozzles) literally says that they’re compatible with the Up Mini 2 ES. What am I missing?

Mini2/2 ES are working with 0.4 mm ONLY. So you cannot change the nozzle diameter as you wish.