the last bit, setting your altitude under the units setup, that is for if you then tick use QFE barometer
I didn’t know that. However ticking the box doesn’t seem to have done anything. My sensor, console, WD and web page (corrected to MSL value) all still display the same value. I’d have expected the ‘corrected to MSL’ value to be 2mb higher than local pressure because I’m approx 20m ASL.