When running a meeting you might like an audience member to share their ideas with the rest of the members. You are able to give them access to speak by giving them permission to broadcast, and the ability to open, close, control files – without giving them administrative access to your meeting.
To do this – click the Participants icon – find your audience member in the list, click the … beside their name and select the Give broadcast permission option.
A broadcasting icon like this 
will appear next to the audience member’s name.
Once the audience member stopped speaking you can remove their broadcast permission by clicking the 
beside their name and selecting Remove broadcast permission.