Commands/ User Features:

Change Nick ~ Typing /nick [new username] changes your username.
Actions ~ You can 'do' an action in the chat room by typing /me followed by your action. For example, typing "/me thinks" will display as "Your name thinks" in the chat.
Private Messages ~ Double click on Username of person you wish to have a private dialogue with. A query window will open.
Ignore User ~ Type /ignore username to ignore all messages from the person. Type /ignore username again to un-do this feature.