How do I style examples of grammar principles?

Note: This post relates to content in the eighth edition of the MLA Handbook. For up-to-date guidance, see the ninth edition of the MLA Handbook.

Examples of grammar principles can be styled in various ways. They can be italicized, enclosed in quotation marks, or set as extracts, to name a few options. Whichever style you choose, be consistent. For models, see the various grammar posts on the Style Center.