The difficulty is that your Document Options include character assignments for 'old' Maestro. So loading your library will force all your symbols to use the legacy character slots. 

So there is no way to do this?

The current work-around to transfer legacy documents to SMuFL in v27 is to export the file via XML and import it into a new v27 file set up for SMuFL.

I’m not trying to import music notation. This is a blank document. I’m trying to import the Document Preferences. MusicXML is not a solution for this.

Oddly enough, MusicXML export/import does retain line width settings, for example.

It might be possible with selective use of the checkboxes for the scope of the Library file when you save it:

But really, this is something that MM need to answer / explain.

It might be possible with selective use of the checkboxes for the scope of the Library file when you save it:

This is what I’m doing. I’m selecting only Document Options.

Could you do the XML import and conversion, and then delete notes and rests to create a new blank document?

Could you do the XML import and conversion, and then delete notes and rests to create a new blank document?

Again, MusicXML does not bring over the majority of the Document Options (or other Library items) that I want to bring over.

SOLVED. Here is the solution: use Robert Patterson’s Settings Scrapbook plugin.

In Finale 27, open the Finale 26 Document Style you want to import. Also open the Finale 27 Finale Maestro (SMuFL) Document Style and Save As a copy. Go to Settings Scrapbook. Choose Items in Menu from the drop-down menu, choose Select All, and then unselect the following:

Bookmarks
Clef Designs
Default Fonts (except Music)
Enigma Font Definitions
File Info
Music Characters

Navigate to your copy of the Finale Maestro SMuFL Document Style, and then choose Paste All in Settings Scrapbook.

That's a commercial PI, though, which not everyone has? 

It may be that MM will add this functionality, along with others, in point updates, as with 26. Trouble is, MM does have a reputation of implementing "some", and promising the remainder, which never quite transpires.

That's a commercial PI, though, which not everyone has? 

Then they’ll have to get it and take advantage of the 30-day trial. For now, this is the only way.