Frame element in sequence diagrams

Question

I've tried to draw a UML frame/border element around a sequence diagram

The following code is almost fine. However, the border does not include the Object names a and b.

Is there a way to solve this?

group Example Sequence chart
hide footbox
a -> b
a <-- b
end

Answer 1

Hi,

is this what you want?

@startuml

box "Example Sequence chart"

participant a

participant b

end box

a -> b

a <-- b

@enduml

BR,

Michael

Comments

You may also check out the latest beta-feature "transparency":
http://forum.plantuml.net/6728/whether-possible-sequenceboxbackgroundcolor-transparent