Hi gang,I have the 737-800/900 NG which only fly in Aussie. With the altimeter, the "QNH" is say 29.83 inHg and it shows on the standby alt. and on theLHS display.What I'm trying to work out is how to change the display to the system used here which is 1010 hPa Wayne

Wayne, please read again the manual.You can easily change from inches to millibars. At the left hand side of your MCP (glareshield) there is a small panel called EFIS panel where you can set QNH in millibars or inches (BARO switch), and other things like decision height, range of the map...etc etc.Look:Jose Luis.