OTRS 5 - how to change customer on a ticket

[peo]

Hi

I might be a simple task.. but i am unable to figure out how to change the customer of an existing ticket in OTRS 5...

In the old version 4 i where able to click at customer in customer information and just change it there..

it seems not to be possible in OTRS 5?
The customer information says: none

Also if the customer is created

[RStraub]

There should be a menu-button (with a little arrow) called "People" ? Click that and select customer.