Kool...
In the page ChatFrame
I selected ChatScoll in the left pane and then dragged the highlighted scrollbar in the right pane to the left (so it was outside of the chat window)
Then selected ChatDisplay in the left pane and dragged it in the right pane to the left to take up the space where the scollbar was.
There lots you can do in that right pane without having to type any sizes or stuff in
