It is tedious to extend the height and width of the class shape areas after added new fields or methods to the class representation.
Googling suggests ctrl-shft-y, / Arrange -> Autosize, but this does not appear to work as expected for "Class" shapes. (It works fine on a regular rectangle).
Has anyone found a good way to add extra fields without manual overhead?
I didn't understand list shapes in Draw.io.
It's explained here https://desk.draw.io/support/solutions/articles/16000054082-adding-entries-in-uml-diagrams
Ctrl-Enter to 'add a new line' (clone a shape in the list) and enter to edit/rename that shape.