Horizontal Group Window Question

[dylkex]

I used the updater to load the variant for a horizontal group window. I have a new healer character and want to try this out with this toon. How do you toggle this capabiliy on? I have gone to Window Setting and played with turning on and off the Title and Frame bar. I can't find any option and the group window is coming up vertical. I am sure I am missing something, but even mousing over the bottom left corner of the window is not helping. Any quick clue would be great....thanks folks