Request Ability to Route a Delay Back into It's Own Chael

In DAWs like Ableton Live and Propellerhead's Reason, you can route a chael back into itself to create a feedback loop, which is can create feedback loops. This is an essential part of making some types of music. My question is: How in Studio One 3 can I send an effect back into itself.

So I have a drum on track 1. I have a delay on FX 1. I tu up the Send on track 1 to FX 1. NOW, how can I take the output of FX 1, and feed it back into the delay thats on FX 1.

In Ableton Live, the retu chaels have send knobs and you can click "enable send" to have the post processed audio sent back down the send chael again. Here is a YouTube video of somebody doing this in Ableton Live: