This one has been on a number of people's wishlists for a while. My own suggestion was to have a simple editable formatting string for both the upper and lower text lines. For example the current top line would be defined as "%title%" (or "%track%. %title%" if you have the track# prefix enabled) while the lower line would be shown as "%artist% - %album%". These two items could be modified via the List Options screen for each category's song list, so you could have a different text arrangeme