can't find sources list for ipod
I'm trying to remove old music/podcasts from an old iPod nano and would also like to update the software, but I can't follow the directions in the online manual to find the Sources List in iTunes. They say to then go to Summary and then to update or restore. On my desktop, the iTunes listing for that (connected) iPod shows the old music but when I click the iPod's icon on my screen, I see the list of new music I want to add. Can't drag or delete the old songs, can't drag the new ones. Any ideas?
iMac with Retina 5K display, iOS 10