Hello,
I have this diagram (simplified example):
@startuml Example
state a
state b
state c
state d
a -d-> b
b -d-> c
c -d-> d
d --> a
@enduml
which produces this rendering:

Is there a way to force the states to be underneath each other, without floating to the left, and the arrow from d to a to curve around the right side?
Thank you very much for your input.