@startuml skinparam wrapWidth 30 skinparam maxMessageSize 30 /' Macros '/ !definelong Event(from, to, message, notes) from ->> to : message note left notes endnote return !enddefinelong '/ End Macros/' box participant "Event Stream" as K #LightGreen participant "A Service" as SRV #Green end box Event(K, SRV, "This is a long message", "This could be a multiline text, but it is not.") K ->> SRV: non-macro long message note right: Here is some more text that could cause a problem and should be wrapped by the wrapWidth skinaparam. @enduml Submit amiga aws-orange black-knight bluegray blueprint cerulean-outline cerulean crt-amber crt-green cyborg-outline cyborg hacker lightgray mars materia-outline materia metal mimeograph minty plain reddress-darkblue reddress-darkgreen reddress-darkorange reddress-darkred reddress-lightblue reddress-lightgreen reddress-lightorange reddress-lightred sandstone silver sketchy-outline sketchy spacelab spacelab-white superhero-outline superhero toy united vibrant       🎉 Discover the future PlantUML Web Editor! 🚀  PNG  SVG  ASCII Art