Multiple midi channels control

Hello

I search a bit everywhere on manuals and parameters I’m unable to have a permanent control of different channels

For example I want in live play to control different parameters. Let say an enveloppe offset on track 1, a CV Out set in matric of track 9, a CC volume for a synth on track 16 and so on…

How do I do ? They all work if I’m on the active track, but not all at the same time.

given that Hapax can only display parameters for one given track at a time in the display windows i’m not sure how having simultaneous control of multiple channels would work in practice

I think I found randomly just at end of my session (but I was concentrating on recording so I didn’t try)

There is parameters for every track “all active” or specific channel. So I think it needs to set to a channel