How to change baro reference from hPa to inHg

[OccamsRazor]

Noob question I know, but I cant seem to figure it out.

[Pils]

On the Challenger? 

 

[Sims Smith]

Hello another question.  How/where do I set the Decision Altitude?  DA(H) either as baro or radio?

[Pils]

42 minutes ago, Sims Smith said:

Hello another question.  How/where do I set the Decision Altitude?  DA(H) either as baro or radio?

Same menu as above except under REFS.

[Sims Smith]

Thank you.