Name the playlist.
(In the example, the name of the playlist is “Avril Lavigne”)
Click on “Music” under Library.
Select the songs that you want to put into the playlist by clicking on it.
Tip: To select more than one song, press “Ctrl” button at the same time when you click on the song.
Drag and Drop the selected songs to the playlist.
Click on the name of the playlist to check whether the songs are on the list. If not, repeat steps 5 and 6.