[Elecraft] K3 VOX by mode only?

[Dan Atchison via Elecraft]

I'd like to use VOX on digital modes, but never on phone and I see no 
way to set it up "by mode" such that the gain can be set to a certain 
value on phone (000), but higher on digital modes.  Am I correct?  Yes, 
I know I can turn it on and off manually.