I’m brand new to BPMN and bpmn.io. I’m using the offline application / Google Chrome client. When I create a pool, I’m unable to add lanes. When I hover my mouse pointer over the pool’s border, I click the left mouse button to reveal a graphical menu. But I only see/get 3 options: append text annotation, connect using sequence/messageflow, and delete.
Chrome plugin support for lanes has not yet been released. Will follow this year.
What might be interesting: we are currently working on a new desktop app for BPMN modeling which offers a better integration into the operating system (e.g. BPMN file type association for *.bpmn files).