Oh, it has 2 chat windows simply because that's what I used but since there's so much horizontal space, you can simply right click a chat window > New Chat window and move it where you want it.
The 2 chat windows already present are locked. Just unlock them by right clicking the chat window > Window > Lock and the you can move and/or resize it
There's still the usual pet window. You can toggle it with Alt + F1
|