You can visualize many use-cases in draw.io. One of the most powerful diagram types is BPMN 2.0. Due to its character of being a unified modeling language (alongside UML), BPMN diagrams are can be drawn and understood anywhere in the world. Make use of this powerful method today with draw.io.
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Or learn more about diagramming with draw.io at https://drawio-app.com/learning. You can also take a look at our blog (https://drawio-app.com/blog) to always stay up-to-date on new draw.io features in Confluence.