How to smooth curved surface?

Adaptive layer height appears at the top in the toolbar.

It gives you quite a convenient tool to trade quality versus print time. However, it uses minimum threshold that, in my view, are outdated and based on thin air.
If the minimum layer height for a given nozzle is insufficient, you can hover the mouse over your printer at the top left to make the setting icon appear. In the Extruder settings, you can set your own threholds.
Just do not go below 0.03mm.
Flow control becomes really tricky below 0.02mm³/s.

:four_leaf_clover: & :crossed_fingers:

Edit: Addendum: