I'd like to see a "crop" feature. For example, if I click on a song and choose to "crop" it - it stays in the playlist while others are deleted. To do the same now, I'm forced to choose all the songs, then unchoose the song I need with Ctrl+Click and then press delete. It's a bit hard, but could be easy with "crop" function. It's already implemented to Winamp, so if you didn't understand what I mean, you can look into it there.