How to delete song(s) in Playlist?

[icerzerocool]

Hi all.

I have numerous of playlists. But I can't delete/remove song(s) in the playlist. Can someone show me how to do it?

It is strange when if you choose a playlist and tap just next to the songs, you'll get this check boxes next to all songs. But I don't see what was the actual function for that. What does these check boxes do actually?

Thanks!