to get the compact version just run the updater assumeing yur useing that
1. go to settings
2. choose Variants
3. scroll to you find Group windows
2 choices
Default or Compact then press ok its does the update and done you now have compact group windows !
Then as GM9 has pointed out several times from the F.A.Q it tells you to :-
The group window comes in two different variants, default sized and compact, and has many hidden functions including the following:
◦
◦The new "frame only" mode sets the window to vertical mode
Hope this helps