Rekordbox 3.x Dual-Pane View

Hi,

where is the dual-pane view in the new rekordbox 3.1? I have upgraded from 2 to 3 and now the best feature is away? I have always on right side the playlist and on the left side the collection... and now I must klick between them like in serato, traktor an all other dj software :-(

Please add this feature again!