Playlist management , how to remove files from it

Feels like I’m really stupid, but in djaypro2 on mac, if I have a playlist, how do I remove a song from it?

I can delete whole playlist, but how do remove just the needed songs from it

What I usually do is I create a folder of music in hard drive, then just add that folder to library.

Then drag and drop the folder so it creates a playlist of it…

So if a file is removed from the folder, should the refresh library remove the file from everywhere : playlists etc etc etc