Manuscript Preparation, Copyediting, and Proofreading

Q. Should a Chicago Manual–style research article be double-spaced, and should the footnotes be 12 pt type? This is a journal submission.

A. Yes. Chicago style for all manuscripts is to double-space everything, and 12 pt type is the industry standard.

[This answer relies on the 17th edition of CMOS (2017) unless otherwise noted.]