Do you mean when you change tube types? As far as I remember the same automatic adjustment occurs on the Axe Fx II.
Otherwise I believe you use the Transformer Match parameter - might be called XFRMR MATCH or something like that. I don't have a II any more.
What I mean is...
After I've changed the pwr tube type parameter in the Axe, what other parameters do I need to adjust to make it sound more typically like when I select different pwr tubes within a real-world amp that allows for various types of power tubes, e.g. like many of the Mesa amps offer.
E.g.
How would one adjust the power amp setting of the USA Clean model (which defaults to 6L6/5881) to better approximate a real MKIV running EL34s in the outer sockets?
[I know this is their so-called "Simul-Class" mode which is a bit trickier to emulate in the Axe and probably also involves adjusting the Axe's power tube bias parameters somehow.
And since the Mesas run both 6L6s and EL34s in so-called "Class A" mode, to do this accurately probably requires two Amp Blocks in parallel as well.]
Or just EL34s in their so-called Class A mode?
[Again, requires adjustment of the Axe's pwr tube bias parameters in some way.]
Or all 6V6s?
[Might also requite re-biasing the model.]
I.e. What else can we do to make it more authentic sounding to changinmg pwr tubes in real world amps when we change the pwr tube types in the Axe models?
Put another way, with another example.
How would one modify a Double Verb model to sound like its preamp was being run through a Marshall power section running EL34s?
Etc.