uml - In Visual Paradigm, how to have a solid line, rather than a dotted line, towards a class that is created later down the timeline? - Stack Overflow
Sequence diagrams when using user's custom image. Solid lines represent... | Download Scientific Diagram
Sequence diagram for the interactive usage case. Solid lines represent... | Download Scientific Diagram
Sequence diagram life line doesn't use dotted lines · Issue #2139 · nus-cs2103-AY1920S2/pe-dev-response · GitHub
Create UML sequence diagrams in draw.io - draw.io
UML Sequence Diagrams : A Quick Introduction
Sequence diagram - Wikipedia
Sequence Diagram - UML 2 Tutorial | Sparx Systems
Loops, Alts, and Refs | ACSSE Software Modelling Guide