Your MultiTracks.com "Library" is the home for every 'song' that has either been planned, purchased, added manually to the library, or created (cloud songs). Songs from the MultiTracks.com catalogue are auto-added to your library often, when an admin or team leader takes actions like
Adding a new song to a setlist
Purchasing any type of content associated with a song
Adding charts into Planning Center using Planning Center Chart Pro import for a new song
Adding lyrics or templates into ProPresenter utilizing Chart Pro or the Stage Display Add-On for a new song
Songs in your library can be there because you've planed them in a setlist, or manually added them from the MultiTracks.com website. Songs can exist in your library when you don't own or haven't rented any content for that song.
Navigating the Library page
The library page has filters at the top, to filter by "Cloud Songs," or "Catalogue Songs," and also filtering by content time; "Songs with charts, or MIDI," etc.
Removing a song from the library
A song can be removed from your library using the ellipsis on the far right of the song row on the Library page.
Removing a song from your library will not remove any of the purchased or rented content from your account but it will remove all cloud-stored data for that song. Including:
Named arrangements
MIDI cue data
Any uploaded Cloud Song tracks and charts