I see in the release notes that Vertical Pools & Lanes can now be rendered in Camunda Modeler as of 5.19.0.
But I can’t, for the life of me, figure out how to actually switch a pool from horizontal to vertical via the UI. (I was able to make the change by dinking with the XML and change isHoriztonal to false.)
Actually, the issue says that quite a lot of vertical modeling functionality is implemented already. It’s just not promoted in the UI.
You can try vertical modeling after performing some manual steps.
Create a new model in Camunda Modeler.
Place a pool in it.
Switch to the XML view (bottom left button).
Change the isHorizontal attribute from true to false.
Switch off the XML view.
Your pool will now be vertical. And most modeling functionality will work vertically. However, sub process modeling may still behave horizontally in some cases.