- Press + New playlist in My library, or right-click any track (long-press on a phone) → Add to playlist.
- Open the playlist and press Design to choose a cover, colours and a description.
- Collaborate: in the playlist menu choose Invite collaborators. Everyone you invite can add and reorder tracks.
- Follow someone else's playlist with the heart button; it appears in your library.
Make a playlist private if only you (and your collaborators) should see it.