I must be missing something. I am reading this article and it says that there is a plugin called \"UML Support\" which is enabled by default. I didn\'t have it, so I went to Pre
Only the ultimate version has the 'UML Support' plugin. This plugin is not free.
https://www.jetbrains.com/help/idea/class-diagram.html
You can install the free plugin - Code Iris.
I use PlantUML for creating diagrams
Other tools of this type in the IntelliJ IDEA are paid.
If you want to install PlantUML plugin to JetBrains product(IntelliJ, Webstrom, Pycharm), you need to
After the installation you could open your UML view from "View -> Tool Windows -> PlantUML"