[Zubersoft]

If you long press the song, tap the three dots at the top right and then tap "Print", you can use the print dialog to specify a range of pages and you can set the output destination as "Save to PDF". So that would accomplish what you are asking for. It's a little different than exporting to PDF though as the export is faster and embeds annotations as actual annotation objects (instead of rendering them as part of each page and building a new PDF from the images that are rendered). So overall the export is still probably the better option, but depending on your needs, printing could be an acceptable alternative.

Mike