How do I transfer songs from playlist to playlist

[Landford]

Please excuse if this has been covered before. I am waiting for my iPad to come in (they are back order 3 weeks) so on the gigs we're just using the Mac editor. But one thing I just can't seem to figure out is how to transfer songs from one playlist to another? I think I can use the forum but hate to post my list as they are just copies of other songs. IS that the only way to copy songs between playlists? Please help.

Thanks in advance-
Tom