Hi Martin,
You need to take the following 2 steps:
This can be done as follows:
[Edit] typos...
Base UI would be like shown here.
From the customers list opening a customer would open a new tab with the edit page for that customer. User should be able to close the tab when done but is also able to view another customer.
Does this explain the situation enough ?
I’m also in need of this feature, there’s some marketplace modules for achive this?