Look up Main Panel Views on the wiki, and maybe Playlists too. It's just a different view and you can change it as needed, either from the main panel or in the playlist's settings.
In fact, I strongly suggest just spending some time with the wiki to familiarize yourself with how MusicBee works. For instance, almost every panel has a menu at the top left corner where you can change options related to that panel. There are some holes, but most of the basic functions and settings are explained on the wiki.