The Chatbox commands are below, They are typed in the "message" block, as were posting a message.
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/me
In the beginning of a sentence, this command will be replaced by your username (ex: /me eats a delicious pizza" will display "Nickname eats a delicious pizza")
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/exit
Disconnect from the Chatbox. Can also precise the reason that will be visible for all members connected (ex: /exit reason)
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/abs
Send a message noticing that you're absent. You can add a reason that will be displayed in the message and visible by all members connected to the Chatbox (ex: /abs reason)
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/me
In the beginning of a sentence, this command will be replaced by your username (ex: /me eats a delicious pizza" will display "Nickname eats a delicious pizza")
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/exit
Disconnect from the Chatbox. Can also precise the reason that will be visible for all members connected (ex: /exit reason)
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/abs
Send a message noticing that you're absent. You can add a reason that will be displayed in the message and visible by all members connected to the Chatbox (ex: /abs reason)