Nine Obscure (but Useful) Recommendations from The Chicago Manual of Style

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Note: This article originally appeared in Copyediting newsletter, which explains the low word-to-humor ratio, and is reproduced with permission.

Reading The Chicago Manual of Style while on deadline is different from curling up with it for a leisurely read. If you haven’t had time for the latter, not to worry. I’ve compiled a list of lesser-known but useful recommendations from the sixteenth edition. [Update: Corresponding references for the 17th edition are in brackets.]



In informal writing, a comma need not follow an introductory yes or no: “Yes we can.”

  • CMS 6.39 [6.34]. In informal writing, a comma need not follow an introductory yes or no: “Yes we can.”
  • CMS 6.104 [6.106]. If one of the terms separated by a slash is an open compound, you can add a space before and after the slash to clarify word groups: exclamation point / period.
  • CMS 7.49 [7.53]. Only the first appearance of a non-English word needs to be italicized if, through repetition, readers will become familiar with it.
  • CMS 7.83 [7.87]. In compound modifiers where an adjective modifies an adjective-noun compound, the first hyphen is not necessary if the meaning is clear: late thirteenth-century music.
  • CMS 8.153 [8.154]. Proper nouns beginning with a lowercase letter followed by a capital—eBay, iTunes, iPhone—are considered capitalized and can begin a sentence or heading with the case of the initial letter intact. (Also see the In Style column “Lowercasing the First Word of a Sentence” in Copyediting’s August–September 2014 issue.)
  • CMS 8.163 [8.165]. Colons and commas omitted on title pages for design reasons should be added to the titles in running text, such as the colon between the title and the subtitle.
  • CMS 8.171 [8.173]. An italicized title used within an italicized title should remain italicized and be enclosed in quotation marks. Other italicized terms (e.g., non-English words, species names, ship names) used within a title should be set in roman.
  • CMS 8.196−7 [7.61–2]. Mottos and common short signs—such as Watch Your Step—are capitalized headline style but not italicized or enclosed in quote marks.
  • CMS 14.105 [14.96]. Though a colon usually separates the main title and the subtitle in running text, it does not follow a main title that ends with a question mark or exclamation point: Higglety Pigglety Pop! Or, There Must Be More to Life.

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