Can I create a sub-process flow?


I’m creating a flowchart that has various sub-processes. I’d like to use child/sibling controls and so auto-layout but can’t understand how to merge the sub-processes back to the main flow-line. I’ve put together a sample flowchart I hope explains what I want to do. I’d like the ‘Run process’ topics to connect back to “Topic to merge back to”. I’ve included the hierarchy too…