Just like on the catalog page, you can double-click the song or click the song title to open the song project. You can also do this by right-clicking the song and selecting the Edit song option.
To edit a recording, you must view the recording details by right-clicking it and clicking the Details option. Then click the Edit pencil icon to edit any field you'd like.
For more information on editing songs, click here.
For more information on editing recordings, click here.