Although not very intuitive, you can already do this.
Open the setlist you want to use as the starting point and then select "create setlist from songs" (you need to be out of performance mode to see this menu). Give it a name and it will copy all the songs in the open setlist to the newly named one. Then modify the latter as required.
Open the setlist you want to use as the starting point and then select "create setlist from songs" (you need to be out of performance mode to see this menu). Give it a name and it will copy all the songs in the open setlist to the newly named one. Then modify the latter as required.
Graeme
1: Samsung 12.2" SM-P900: Android 5.0.2
2: eSTAR GRAND HD Quad-Core 4G 10.2": Android 5.1
Some of my music here - https://www.soundclick.com/graemejaye
1: Samsung 12.2" SM-P900: Android 5.0.2
2: eSTAR GRAND HD Quad-Core 4G 10.2": Android 5.1
Some of my music here - https://www.soundclick.com/graemejaye