PlantUML: Hide unlinked participants in a sequence diagram

All the participants are displayed in a diagram by default. If you do not want to display unlinked participants, you can use the command 'hide unlinked'.

 

normalFlow.txt

@startuml

participant sys1
participant sys2
participant sys3
participant sys4

sys1 -> sys2: M1
sys1 <- sys2: M2
sys1 -> sys2: M3

@enduml

 

Above snippet generate below diagram.

 

 

As you observe the above diagram, sys3, sys4 too displayed even though they do not have a linkage between other participants.

 

Let’s hide the unlinked participants.

 

hideUnlinkedParticipants.txt 

@startuml

hide unlinked

participant sys1
participant sys2
participant sys3
participant sys4

sys1 -> sys2: M1
sys1 <- sys2: M2
sys1 -> sys2: M3

@enduml

 

Above snippet generate below diagram.

 

 

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