In the webinar dashboard, choose "Open live webinar" to enter the live environment.
The number of current viewers is displayed in the top right, which is a number that’s only visible to the presenter. You’ll be able to see it before, during and after going live.
In the control panel, click on the second icon on your right hand side, here you’ll find the participants list.
The green dot indicates the viewer is online, while the orange dot indicates the viewer went offline.
From here, you can start a private conversation with a person and you have the option to ban someone from the chat.