There are two ways.

1. Enter the list of my favorite songs, and then-edit-add songs.

Give this song a five-star rating. This song can also be my favorite. You can evaluate it in itunes on your computer or directly on your device. I won't go into details.

My song list is named by myself and can be named by various symbolic expressions. Very interesting, you have to delete the default list, hehe.

The above is my experience, I hope it will help you.