Please refer to this diagram:
@startuml
A -> A : selfmsg1
activate A
A -> A : selfmsg2
activate A
A -> A : selfmsg3
activate A
A -> B : message
deactivate A
deactivate A
deactivate A
@enduml
all nested lifelines of A end at the same point, how can I add some spaces there?
Adding ||| between "deactivate A" doesn't work! Thank you!
@startuml
A -> A : selfmsg1
activate A
A -> A : selfmsg2
activate A
A -> A : selfmsg3
activate A
A -> B : message
deactivate A
|||
deactivate A
|||
deactivate A
@enduml
