Another thing I am missing is choosing a subfield in a title expression.
Lets say I have a #person supertag with a field Abbreveation.
In the supertag #work package I have the field "Responsible" which relates to a #person.
In the title of the #work package I now want to show the Abbreveation of the #person and not the node name of that #person.
Basically I want the functionality that already works foy system variables like ${sys:owner}. I just need that extended to all supertags so I could use ${Responsible:Abbreveation}
I am dumb. That already works. Just use a dot in between. ${Responsible.Abbreveation}