Why can't I see the "Items not in my library" option when importing music using Home Sharing?

I am using Home Sharing to import music from another library. I am able to connect to the other library and select the songs I want to import, but there is no way to tell the system to import the songs. While researching Help, step 3 indicates "Click the Show pop-up menu at the bottom of the Music window, then choose “Items not in my library." This menu is not at the bottom of the Music window so I can't import the songs. I am on Sonoma 14.6.1. Any suggestions would be appreciated.

[Re-Titled by Moderator]