How do you change the QNH number ??? I can't find a button on my panel to change that number ?Regards,Dimitri

It would help Dimitri if said which aircraft.In general it is the one marked 'BARO' usually located bottom left of the altimeter.If flying default aircraft and you want to set it to local QNH then just hit the 'B' key on the keyboard, not sure if hitting it again above 18,000ft sets it back to standard pressure, give it a go.Merry Xmas.

HEy Vulcan,Thanks for your help :-)I was talking about every aircraft in FS sorry forgot to say... I was just wondering if you can change the QNH manually.Merry X-mas to you too !!!REgards,Dimitri