I have no doubt that I'm just dense, but I still can't get it to work. I can enter mouse mode just fine. I can even expand the entire chat box. If I Mouse 1 on the General tab, I can drag the box around. What I can't do is create an additional chat box like I've seen in some screenshots. I can create new tabs, but they stay within the current chat box.
My ultimate goal here is to stack the two chat boxes. I'd make one for battle info and the other for communication. I'm quite technically challenged, so I wouldn't be surprised if I'm just a moron here and I'm missing something obvious. All the same though, I'd appreciate it if anyone would try explaining it to me one time. Thanks for your patience.