Mainchat extent from bottom issue

[pheebau]

I'm tweaking some UI and my last issue is which setting will let me drag and extent some (main) chat window from the bottom - the default I have can only be extended from the top of the frame - I want to be able to do it from the bottom but it won't extend - been playing with various settings but it is not working...

Would appreciate some pointer if anyone knows what to set or change for this to work.

Cheers,