Displaying backup altimeter instead of G1000 altimeter on the instrument panel

Hi, is there a way to display the backup altimeter instead of the G1000 altimeter on the instrument panel when loading the Cessna 172 G1000 ? as it seems the Kollsman increase and decrease pressure doesn't work anymore on the G1000 altimeter and I didn't find a way to get the keys combination for the increase or decrease of altimeter pressure for the G1000 :(