Chat provides a way for users connected to the same node to communicate with each other. You must be connected to a node to start a chat session for that node. Only users on the same node will be able to chat with each other.
If a chat session is in progress, right-click on the node, select Chat, then Show Chat Session to join the chat session.
The chat session window will appear with the message fields on the left and a list of users in the chat session on the right.
You can also close a chat session for all participants from the nodes tab. Right click on the node with the chat session, select Chat, then End Chat Session.