The batch downloader is a simple yet powerful tool that helps you download lyrics for entire playlists of tracks, or even your entire iTunes library.
To use it, open the batch downloader window by pressing ⌘B or clicking Lyric > "Batch downloader..."
Once open, simply select a playlist in the list to the left and click "Go" to start the download. Progress will be displayed while the batch downloader is working.
When the batch downloader is finished processing a track, an icon representing either success or failure will be displayed.