How to drag songs from one library to another on the newest version of iTunes?? Any help would be appreciated! :D

So I have all the libraries in my family set up - I have 5 libraries connected 🙂 And with the newest version of iTunes - I am having some trouble dragging my dad's songs to my brother's library!

I looked up help and all I got was old advice about an 'Import button' which I know is relating to an older version of iTunes...

Any suggestions anyone?? 🙂

Thank you for your time!!! 😁