I was excited to see the addition of run/debug structures fixed in the latest EAP.
I tried to use it in my existing project but couldn't work it out.
I tried all the buttons that I could see and even tried dragging and dropping one run config onto another (that might be a useful new feature!)
It took me a while to realise that there was an extra toolbar icon that appeared when you click on the top folded level
e.g. Application or TestNG.
I have never clicked on this level before as I always either click on the expand (+) button or on the run config itself.
Can you make the icon visible all the time please.