I'm using box in sequence diagrams. I'm using "self-calls" on the right most participant. ==> The box doesn't span over all the text. Why?
My code:
@startuml
box #WhiteSmoke
participant HI order 20
participant EC order 10
end box
== NMT startup ==
HI -> HI : Boot()
& EC -> EC : Boot()
HI -> HI ++ : Startup(EnterInitialisation_Init)
& EC -> EC ++ : Startup(EnterInitialisation_Init)
HI -> HI : Startup(InitCANopenDevice)
& EC -> EC : Startup(InitCANopenDevice)
@enduml