Thank you @david for your help.
I tried to get it work, but I fail.
I cleaned the global gen. no. settings
Set up a dummy Account with two Clients:
Left the client gen. no. settings blank to the idea they would inherit the global settings:
… an configured the the numbers like this vor each Client:
but I get this project numbers:
I want to achieve something like this:
ACL-0001 as project number/reference.
One usability improvment: In Client-View should also be a
+ New Project
If this client-centered approach works it would be helpful to Clone a Client, so that you just have to adjust the given settings.
Can you advise a, how I can setup this number-issue, please?