When a tune page on SongTrellis displays a link to the SongTrellis Excerpt Service, you can copy the chord sequence from an excerpt that you choose inside that tune and move it to the end of the chord voice in your Workscore. Then you can use the Workscore Composer page and create a new melody on top of the copied chord progression.
	To copy the chord sequence from an excerpt, follow the "SongTrellis Excerpt Service" link from the tune page. On the request page that appears, select the excerpt that you would like to copy by changing the values of the First Bar and Last Bar fields to point to the boundaries of the excerpt you would like to have and press the Play button to verify that the excerpt is what you wanted to hear.
	Then press the "Add Excerpt Chords" button at the bottom of the Excerpt page. The chords from your excerpt will be copied to your Workscore