how do I import music from another user/computer into my library?

Looking for info on how to import music from a different user/computer? I can see the other users library in my iTunes, I used to be able to just click on the song and drag it into my library. This method no longer works. Is there a new way to do this? we both have sharing turned on & can see both our library's . Both computers are running Yosemite and the newest version of iTunes.