Responder
Participants need to select the OK icon to answer.
Message
Click to enable/disable the message function.
Message operation:
1. Click the Message icon to enable the function.
2. Participants select the Message icon to change the Message interface.
3. Participants key in their message then click the Send icon.
4. The message will appear at the top of the ViewBoard.
Manager
Select the icon to display a QR Code to let more participants join the class.
Exit
Select to exit the Air Class interface.
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