Control gutter

Is it possible (in Scrivener for Windows) to control the gutter?

I saw a post in this forum that claims it is not and also a blog post elsewhere that claims that “left margin” is really “gutter margin” and “right margin” is the “outer margin.”

When I set my left margin larger than the right margin, the CreateSpace previewer shows that “left” means “left”, not “gutter.” The inner margin on my right-hand pages is larger than on my left-hand pages.

Creating a PDF for print is such an exceptionally common thing to do once a manuscript is completed. Is it really not possible to control the gutter in Scrivener for Windows?