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A new playlist will appear under the Playlists category in the left navigation menu. When you create the playlist, the name will automatically be highlighted, allowing you to enter any name you want. Once you've given it a name, it's time to add some songs! Browse through your library and drag any songs, albums, or artists that you want to add over to the playlist icon. New songs will added to the bottom of the list. Click on your playlist to see the list of all of the songs. You can click and drag songs around the playlist to reorganize the list how you see fit.
Click File and select "Create playlist". Name your playlist. Add files to your new playlist. Organize your playlist.