When I Save My Preferences...

Question:

When I save my preferences using the “Manage…” button in the Preferences dialog, what exactly gets saved? (And are there any differences between saving as a theme and saving a preferences file?) Does Scrivener also save my custom meta-data stuff from the Project menu in the preferences, or is that saved with the Project? Also, if I do a “Save As Template” from the File menu, what specifically gets saved? (And is custom meta-data, such as custom labels/statuses/etc, part of that?) What about default window size and position … is that part of my “preferences,” or does that get saved with each document? (And will it translate to a template if the current document is saved as one?)

–Andy