Brian beat me to the punch - I was typing my reply up when he posted. Well, since I put the time in to create it I am posting it anyway, even though we cover much of the same ground. His advice is great as always, but perhaps an additional slightly different take will be beneficial.
So, on the left is the list of artist, genre etc. Fine
My initial thought is you were talking about a
Panes view layout for the
left hand split view. It took me a minute, but then realized you actually were referring to the MC
Tree. The Tree is
always present on left (well... sort of, but that is for another day) with limited layout options, and is not a "view". What you call the "middle" is actually the
left view (of a 2 column split view). May seem like a silly distinction, but helping people understand your issue will get you the best solution/advice faster. Screenshots are particularly helpful.
So how did you get the view you wanted in the
left hand split view? By clicking an item in the
Tree ... correct? So you do the same thing for the
right hand split view -
first... click anywhere in the right view to make it
active. Then click on
Playing Now at the top of the MC Tree. To avoid accidentally changing the tab you just set for the right split view, click on it and select
Lock Tab from the drop-down menu. A little padlock icon will show in the tab on the left.
Below is what I suspect to be the layout you are looking to achieve.