1. On the main Calliflower page, find your call.
2. Click the orange "Edit" link associated with that call.
3. If the call is a recurring call, you will be asked to make a choice between editing the current occurrence, or the entire series.
4. Under the heading EDIT CALL you will see a dark green circle labelled CHANGE Call Info, and two lighter green circles to the right of the CHANGE Call Info circle. Click on the INVITE Participants circle. This will bring you to the Invite Participants screen.
5. Add participants the way that you normally would.
6. Click FINISH at the bottom of the screen.
7. When prompted, allow Calliflower to send updates to the participants.

That's all!