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You can reopen a closed channel if you are the channel owner.

To find the closed channel, in the AirSend dashboard's Channel drop-down list, choose Show Closed or Show All. 
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The channel appears on the desktop.

1. Either reopen the channel from the AirSend dashboard: 
   Click the three dots in the upper-right corner of the channel icon, and click Activate channel.
   
   
   
2. Or reopen the channel from within the channel:
   1. Open the channel, and in the channel toolbar, click the settings button:
      
       The Channel settings dialog box opens.
   2. Click Operations.
   3. Next to Activate Channel, click Activate.
      
      

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