Exporting to USB only certain tracks within a playlist

Hi, I think it would be handy and useful if you were able to export ONLY some of the tracks within a playlist.
This means that when you look at your USB in rekordbox ONLY those songs that you exported are present into the playlist.
At the moment, if you try to export a song not via Sync Manager but by righ-clicking a song and then "Export Track" and "*device name*" the song shows up but not in the playlist that is in rekordbox.