Hi Roel.
I just wrote the same thing as Aposmus suggested in a post above.
When you connect a parameter of one zone, the id of the parameter is already there so you don’t need to look it up in parameter list.
Then you only need to adapt the beginning of the connection to target all zones, not just the one you connected.
But it can also work the other way around. When you need a scope for a zone or layer itself.
Just connect any parameter, then delete the last bit (@id:…). Now you have the scope for the zone or layer.
How did you figured that one out ?
Manual, trial and error, and this forum.
It was explained by one of the devs.