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The Chicago Manual of Style

@chicagomanual.bsky.social
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The venerable, time-tested guide to style, usage, and grammar. An indispensable reference, informing the editorial canon with sound, definitive advice at cmos.style/ONLINE. We answer your “Chicago Style” questions at cmos.style/QandA.

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The Chicago Manual of Style @chicagomanual.bsky.social · 29/09/2026
Our free Q&A archive features nearly thirty years’ worth of answers to your questions, now updated to reflect the latest Chicago style. Visit CMOS Shop Talk for more details.
cmosshoptalk.com
Chicago Style Q&A: Now Updated
The Chicago Manual of Style Q&A has been posting answers to your questions since way back in 1997, when it was known as the “FAQ (and not so FAQ).” Most of these questions and answers have remained on...
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The Chicago Manual of Style @chicagomanual.bsky.social · 24/09/2026
Write “painter’s tape” rather than “painters’ tape” or “painters tape.” Details in the Q&A.
chicagomanualofstyle.org
The Chicago Manual of Style, 18th Edition
Find it. Write it. Cite it. The Chicago Manual of Style Online is the venerable, time-tested guide to style, usage, and grammar in an accessible online format. ¶ It is the indispensable reference for ...
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The Chicago Manual of Style @chicagomanual.bsky.social · 22/09/2026
Chicago’s most popular citation style is also its most flexible. Explore how it works—and why footnotes are styled differently from bibliography entries—in the latest update from CMOS Shop Talk.
cmosshoptalk.com
Understanding Chicago-Style Notes and Bibliography Entries
Chicago’s main system for citing sources consists of numbered footnotes or endnotes and, usually, a corresponding list of sources in a bibliography.
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The Chicago Manual of Style @chicagomanual.bsky.social · 08/09/2026
Q. Is “roadtrip” ever correct? Q. Would you hyphenate “almost encyclopedic” before a noun? Q. How do you cite an article in a double issue of a magazine? We answer these and other questions about Chicago style in the September Q&A at CMOS Online. cmos.style/QandA
Close-up of a Jack Russell terrier in orange sunglasses and a blue collar driving a modern sedan, its left paw resting on the door frame while announcing the CMOS Q&A.
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The Chicago Manual of Style @chicagomanual.bsky.social · 27/08/2026
In most types of prose, common names for birds can usually be spelled without initial caps (e.g., blue-footed booby). Details in the Q&A.
chicagomanualofstyle.org
The Chicago Manual of Style, 18th Edition
Find it. Write it. Cite it. The Chicago Manual of Style Online is the venerable, time-tested guide to style, usage, and grammar in an accessible online format. ¶ It is the indispensable reference for ...
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The Chicago Manual of Style @chicagomanual.bsky.social · 20/08/2026
ICYMI: A comma is usually optional after a word like “today” or “yesterday” at the beginning of a sentence. Details in the Q&A.
chicagomanualofstyle.org
The Chicago Manual of Style, 18th Edition
Find it. Write it. Cite it. The Chicago Manual of Style Online is the venerable, time-tested guide to style, usage, and grammar in an accessible online format. ¶ It is the indispensable reference for ...
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The Chicago Manual of Style @chicagomanual.bsky.social · 18/08/2026
What does “the 2000s” mean to you, the decade or the century or the millennium? What about “the 1900s”? Our latest update at CMOS Shop Talk considers the challenge of writing about first decades.
cmosshoptalk.com
Decades
This post was originally published in 2019, or just before the beginning of the 2020s, also known as the ’20s or the twenties. Every decade after this one will be referred to similarly: 2030s, ’30s, o...
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The Chicago Manual of Style @chicagomanual.bsky.social · 11/08/2026
Q. Would “as well as” be lowercase in a title? Q. What’s the rule for hyphenating a letter plus a noun? Q. How should timings be formatted in source citations? We answer these and other questions about Chicago style in the August Q&A at CMOS Online. cmos.style/QandA
A brown-and-white Chihuahua announces the August Q&A. The dog, wearing sunglasses, sits on a strip of sand against a deep-blue background, its long hair blowing sideways in the wind.
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The Chicago Manual of Style @chicagomanual.bsky.social · 06/08/2026
In Chicago style, “time-clock-punching employees” (with two hyphens) would be preferred to “time clock–punching employees” (with an en dash) and “time-clock–punching employees” (with a hyphen and an en dash). Details in the Q&A.
chicagomanualofstyle.org
The Chicago Manual of Style, 18th Edition
Find it. Write it. Cite it. The Chicago Manual of Style Online is the venerable, time-tested guide to style, usage, and grammar in an accessible online format. ¶ It is the indispensable reference for ...
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The Chicago Manual of Style @chicagomanual.bsky.social · 23/07/2026
Curious about spaces before punctuation marks in French text? Change your proofing language to French in Microsoft Word and watch what happens as you type. Details in the Q&A.
chicagomanualofstyle.org
The Chicago Manual of Style, 18th Edition
Find it. Write it. Cite it. The Chicago Manual of Style Online is the venerable, time-tested guide to style, usage, and grammar in an accessible online format. ¶ It is the indispensable reference for ...
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The Chicago Manual of Style @chicagomanual.bsky.social · 21/07/2026
Chicago style for abbreviating number ranges is efficient and (once you get the hang of it) easy to apply. For a quick refresher, check out this post from CMOS Shop Talk.
cmosshoptalk.com
316–7, 316–17, or 316–317? Chicago Style for Number Ranges
Abbreviating number ranges according to the system recommended by The Chicago Manual of Style is easy if you can remember three basic rules (illustrated here with page numbers, which don’t require com...
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The Chicago Manual of Style @chicagomanual.bsky.social · 16/07/2026
When naming the title of a book or an article or the like, either “titled” or “entitled” is correct, though the former is usually preferred. And don’t use a comma after either one. Details in the Q&A.
chicagomanualofstyle.org
The Chicago Manual of Style, 18th Edition
Find it. Write it. Cite it. The Chicago Manual of Style Online is the venerable, time-tested guide to style, usage, and grammar in an accessible online format. ¶ It is the indispensable reference for ...
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The Chicago Manual of Style @chicagomanual.bsky.social · 07/07/2026
Q. Do you need a comma before “then” when it means “in that case”? Q. Is it “the angel Gabriel” or “the Angel Gabriel”? Q. Do typefaces/fonts need to be credited? We answer these and other questions about Chicago style in the July Q&A at CMOS Online.
chicagomanualofstyle.org
The Chicago Manual of Style, 18th Edition
Find it. Write it. Cite it. The Chicago Manual of Style Online is the venerable, time-tested guide to style, usage, and grammar in an accessible online format. ¶ It is the indispensable reference for ...
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The Chicago Manual of Style @chicagomanual.bsky.social · 02/07/2026
ICYMI: The phrase “dogs have tails” is generally preferred to “dogs have a tail,” but either one depends on readers knowing something about dogs and tails. Details in the Q&A.
chicagomanualofstyle.org
The Chicago Manual of Style, 18th Edition
Find it. Write it. Cite it. The Chicago Manual of Style Online is the venerable, time-tested guide to style, usage, and grammar in an accessible online format. ¶ It is the indispensable reference for ...
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The Chicago Manual of Style @chicagomanual.bsky.social · 25/06/2026
ICYMI: An em dash can be used in place of almost any mark of punctuation in a sentence—for better or worse. Details in the Q&A.
chicagomanualofstyle.org
The Chicago Manual of Style, 18th Edition
Find it. Write it. Cite it. The Chicago Manual of Style Online is the venerable, time-tested guide to style, usage, and grammar in an accessible online format. ¶ It is the indispensable reference for ...
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The Chicago Manual of Style @chicagomanual.bsky.social · 18/06/2026
ICYMI: When the name of a friend follows the word “friend,” a comma is rarely required (“my friend John”); with spouses, commas are the default (“my husband, John”). Details in the Q&A.
chicagomanualofstyle.org
The Chicago Manual of Style, 18th Edition
Find it. Write it. Cite it. The Chicago Manual of Style Online is the venerable, time-tested guide to style, usage, and grammar in an accessible online format. ¶ It is the indispensable reference for ...
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The Chicago Manual of Style @chicagomanual.bsky.social · 16/06/2026
Do you like commas? We do too, even if we don’t require them with “too” (or “either”). Get the full story (going back to 1906) in this latest update from CMOS Shop Talk.
cmosshoptalk.com
Commas with “Too” and “Either”
The seventeenth edition of CMOS was the first edition to rule explicitly on whether “too” in the adverbial sense of “also” should be set off by commas. The rule applies also to “either,” which as an a...
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The Chicago Manual of Style @chicagomanual.bsky.social · 02/06/2026
Q. Should a compound modifier be hyphenated if the noun doesn’t directly follow? Q. Should I retain accents in Spanish city names? Q. How should amendments to laws be cited? We answer these and other questions about Chicago style in the June Q&A at CMOS Online. cmos.style/QandA
A border collie wearing white-framed sunglasses announces the CMOS June Q&A while encircled by a watermelon-themed swim ring against a yellow background.
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The Chicago Manual of Style @chicagomanual.bsky.social · 19/05/2026
If “a.m.” means before noon and “p.m.” means after, then what do “12 a.m.” and “12 p.m.” mean? Noon and midnight (or midnight and noon) are the subjects of this latest update from CMOS Shop Talk.
cmosshoptalk.com
Noon and Midnight
Many of us write or say “12 p.m.” (or “12:00 p.m.”) when we mean noon and “12 a.m.” when we mean midnight. This seems reasonable enough, at least intuitively.
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The Chicago Manual of Style @chicagomanual.bsky.social · 12/05/2026
The commenting tools in Adobe Acrobat have helped to make on-screen proofreading the norm. But how exactly do they work? PDF markup is once again in the spotlight, in a newly updated post from CMOS Shop Talk.
cmosshoptalk.com
PDF Proofreading Markup
Copyeditors typically work in Microsoft Word or Google Docs or the like, making and suggesting changes directly in the document, which at that stage is still referred to as a manuscript. Proofreaders ...
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The Chicago Manual of Style @chicagomanual.bsky.social · 05/05/2026
Q. Is “The more the merrier” a complete sentence? Q. Is “kindly” used correctly in “We kindly ask …”? Q. “It’s not only this, it’s that.” Is that a comma splice? We answer these and other questions about Chicago style in the May Q&A at CMOS Online. cmos.style/QandA
A white shorthair cat and a border collie peer at us over the top of a sign announcing the May Q&A from The Chicago Manual of Style. An orange background matches their eyes.
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The Chicago Manual of Style @chicagomanual.bsky.social · 21/04/2026
Hyphens can help make words with prefixes easier to read, but when do you draw the line? This latest update from CMOS Shop Talk will help you decide.
cmosshoptalk.com
Prefixes: A Nonissue, or a Non-Issue?
A prefix is a partial word that joins to the front of another word (and sometimes a phrase) to create a new word with a different meaning. The pre- in prefix is a prefix, for example.
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The Chicago Manual of Style @chicagomanual.bsky.social · 07/04/2026
Q. Should “ill” plus a verb be hyphenated? Q. How are titles of books treated in Spanish text? Q. What is the rule on hyphenating multiple colors? We answer these and other questions about Chicago style in the April Q&A at CMOS Online. cmos.style/QandA
Head shot of a fluffy yellow duckling in three-quarter profile against a blue sky with white clouds announcing the April CMOS Q&A.
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The Chicago Manual of Style @chicagomanual.bsky.social · 24/03/2026
Are tabular figures proportional or monospaced? What is a serif? Is letterspacing the same thing as kerning? What does the “S” in “HTTPS” mean? Explore these and other editing-adjacent terms in the latest update from CMOS Shop Talk.
cmosshoptalk.com
Key Terms Every Editor Should Know
In editing as in life, things tend to come in pairs. Life has its ups and downs, left and right, sea and land, victory and defeat. In editing you have capitals and lowercase, justified and ragged righ...
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The Chicago Manual of Style @chicagomanual.bsky.social · 03/03/2026
Q. Should asterisk note references be superscripts? Q. Is it OK to use “where” for something other than a place? Q. I’m trying to cite info about The Simpsons. It’s complicated. Can you help? We answer these and other questions about Chicago style in the March Q&A at CMOS Online. cmos.style/QandA
The Q and A, spelled out in a whimsical yellow cartoon font with black shadows against a warm red background.
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The Chicago Manual of Style @chicagomanual.bsky.social · 18/02/2026
Footnotes or endnotes? Many of us prefer footnotes, but endnotes can be less distracting, especially when there are no numbers in the text. Find out how these “invisible” endnotes work, this week at CMOS Shop Talk.
cmosshoptalk.com
“Invisible” Endnotes
This post discusses the pros and cons of so-called invisible endnotes in books and how to prepare a manuscript that has them.
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The Chicago Manual of Style @chicagomanual.bsky.social · 03/02/2026
Q. Is it “password protect” or “password-protect”? Q. Why aren’t “heaven” and “hell” always capitalized? Q. How would I cite an unpublished diary entry? We answer these and other questions about Chicago style in the February Q&A at CMOS Online. cmos.style/QandA
Headshot of a Shiba Inu dog against a pink background, wearing translucent red heart-shaped glasses and announcing the February CMOS Q&A.
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The Chicago Manual of Style @chicagomanual.bsky.social · 20/01/2026
Until about a century ago, most publishers did “this.” But many publishers now do ‘this’, or “this”. Find out what happened, and why, in this newly updated post at CMOS Shop Talk.
cmosshoptalk.com
Commas and Periods with Quotation Marks
In publications that follow Chicago style, commas and periods are placed before a closing quotation mark, “like this,” rather than after, “like this”. This convention has persisted even though it’s no...
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The Chicago Manual of Style @chicagomanual.bsky.social · 13/01/2026
Q. “Do the speaker or the characters have any faults?” Or “Does”? Q. En dash or hyphens in “time clock punching employees”? Q. Can you have a footnote 1 with no 2? We answer these and other questions about Chicago style in the January Q&A at CMOS Online. cmos.style/QandA
A white, scarf-wearing Samoyed dog races down a groomed trail on a red and black snowboard and announces the January CMOS Q&A.
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The Chicago Manual of Style @chicagomanual.bsky.social · 16/12/2025
The spaces between these words are just one of more than a dozen kinds of spaces. Discover more in this latest update from CMOS Shop Talk, which includes links to several related (and newly updated) posts.
cmosshoptalk.com
Navigating Spaces in Manuscripts and Beyond
To a copyeditor working on a manuscript, a space is usually just a space, and line breaks are random, fluid occurrences that vary as text is added and deleted and moved around. Designers and typesette...
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The Chicago Manual of Style @chicagomanual.bsky.social · 02/12/2025
Q. I know about commas and spouses, but what about friends? Q. Do we refer to fictional characters by first or last name? Q. Is “four-hundredth birthday” correct? We answer these and other questions about Chicago style in the December Q&A at CMOS Online. cmos.style/QandA
A Pembroke Welsh corgi and a calico cat frolic together in the snow and announce the December Q&A.
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Reposted by The Chicago Manual of Style
The University of Chicago Press @uchicagopress.bsky.social · 01/12/2025
The end of our sitewide sale (and our holiday shipping deadline) is coming up soon! Enjoy 30% off these stocking-stuffer-sized beauties and more with code HOLIDAY25 through December 3. 🛍️ Shop here: buff.ly/zQhPoCx
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The Chicago Manual of Style @chicagomanual.bsky.social · 25/11/2025
Peter B. Kaufman’s new book provides a publisher’s road map for a world in which video has become at least as important as text. The Moving Image: A User’s Manual is the subject of our latest interview at CMOS Shop Talk.
cmosshoptalk.com
Peter B. Kaufman talks about The Moving Image
Peter B. Kaufman is Associate Director of Development at MIT Open Learning. He is the author of The New Enlightenment and the Fight to Free Knowledge (Seven Stories Press, 2021) and founder of Intelli...
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The Chicago Manual of Style @chicagomanual.bsky.social · 18/11/2025
The abbreviations “i.e.” and “e.g.” are clearly not the same, so why are they always getting mixed up? And which one can be used with “etc.”? Refresh your knowledge of three common Latin abbreviations, this week at CMOS Shop Talk.
cmosshoptalk.com
I.e., E.g., Etc.
Latin may be a dead language, but many of its words and phrases flourish in today’s English. The most common Latin borrowing might be an abbreviation: the all-purpose etc., short for et cetera, “and o...
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The Chicago Manual of Style @chicagomanual.bsky.social · 04/11/2025
Q. Why doesn’t “post-traumatic stress disorder” have an en dash? Q. Neither I/me nor my dog responded. “I” or “me”? Q. What’s the best way to style “the f-word”? We answer these and other questions about Chicago style in the November Q&A at CMOS Online. cmos.style/QandA
Headshot of a long-haired Chihuahua staring straight into the camera against a sky-blue background and announcing the November CMOS Q&A.
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The Chicago Manual of Style @chicagomanual.bsky.social · 21/10/2025
Interruptions can be annoying, especially when you’re not sure where to put the commas. Interrupted conjunctions are the subject of this newly updated post, only at CMOS Shop Talk.
cmosshoptalk.com
Punctuating Interrupted Conjunctions
Coordinating conjunctions join pairs of words, phrases, or clauses, but when such a conjunction is interrupted by an intervening phrase or clause, it can be difficult to know where to put the commas.
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The Chicago Manual of Style @chicagomanual.bsky.social · 07/10/2025
Q. Should “little blue heron” be capitalized? Q. Should it be “sample A” or “Sample A”? Q. How would you style the title of a playlist? We answer these and other questions about Chicago style in the October Q&A at CMOS Online. cmos.style/QandA
A little blue heron stands on a partially submerged log in green, marshy water and announces the CMOS Q&A.
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The Chicago Manual of Style @chicagomanual.bsky.social · 30/09/2025
Family members may deserve our love and respect, but when do they merit an initial capital? Get the latest advice for capitalizing kinship names and similar words for people, this week at CMOS Shop Talk.
cmosshoptalk.com
Capitalizing Kinship Names and the Like
A kinship name is a name for a family member, whether close or distant. Such names include mom, dad, sister, brother, aunt, uncle, cousin, and so on.
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The Chicago Manual of Style @chicagomanual.bsky.social · 09/09/2025
Q. Why is MS Word asking me to change “all of” to “all”? Q. Do I have to put boat names in italics? Q. How do I cite a Substack post? We answer these and other questions about Chicago style in the September Q&A at CMOS Online.
chicagomanualofstyle.org
The Chicago Manual of Style, 18th Edition
Find it. Write it. Cite it. The Chicago Manual of Style Online is the venerable, time-tested guide to style, usage, and grammar in an accessible online format. ¶ It is the indispensable reference for ...
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The Chicago Manual of Style @chicagomanual.bsky.social · 12/08/2025
One of the best ways to understand a rule is to consider its exceptions. Find out more in this newly updated post at CMOS Shop Talk (and be sure to read to the end for links to two more “exceptional” posts).
cmosshoptalk.com
A Few Exceptions Worth Noting
Even the most straightforward rule will be subject to an exception sooner or later. That’s why CMOS qualifies so many of its rules with usually or generally. But some exceptions are so common that the...
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The Chicago Manual of Style @chicagomanual.bsky.social · 05/08/2025
Q. Can the first defined use of an abbreviation be plural? Q. Does “painters tape” need an apostrophe? Q. How do you cite a book that has a typo on the title page? We answer these and other questions about Chicago style in the August Q&A at CMOS Online. cmos.style/QandA
A pied French bulldog in a golden collar trots along a wide sandy beach on a sunny day while announcing the CMOS Q&A.
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The Chicago Manual of Style @chicagomanual.bsky.social · 23/07/2025
Our online Q&A has been answering your questions about Chicago style since 1997. This month we dig into the archives for some tips and tricks, only at CMOS Shop Talk.
cmosshoptalk.com
Inside the Q&A: Tips and Tricks
The Chicago Manual of Style Q&A first went online in 1997. According to a page from June of that year at the Wayback Machine, one early question was about submitting manuscripts on disk, which back th...
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The Chicago Manual of Style @chicagomanual.bsky.social · 01/07/2025
Q. Should “Fortune” be in italics in “Fortune 500”? Q. Is a comma needed after a word like “yesterday”? Q. Does a term following “called” need to be in italics? We answer these and other questions about Chicago style in the July Q&A at CMOS Online. cmos.style/QandA
A white shepherd dog in a tropical shirt and yellow sunglasses smiles at us from a perfectly blue sky and announces the July Q&A
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The Chicago Manual of Style @chicagomanual.bsky.social · 10/06/2025
Commas, like people and ducks, are often found in pairs. Read all about it in our latest post—which includes links to five related posts, all newly updated. Only at CMOS Shop Talk.
cmosshoptalk.com
When Commas Come in Pairs
Commas, like the two in this sentence, often come in pairs. When they do, they’re usually acting like miniature parentheses. In fact, whenever you’re tempted to omit the second of two commas, convert ...
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The Chicago Manual of Style @chicagomanual.bsky.social · 03/06/2025
Q. Should a unit with a fraction like “1/4” be singular or plural? Q. How would Chicago style the AI company name “io”? Q. Why is “due process clause” lowercase in Chicago style? We answer these and other questions about Chicago style in the June Q&A at CMOS Online. cmos.style/QandA
A closeup of a Labrador retriever standing up to its neck in a golden pond against a backdrop of trees and next to a tennis ball that features the text "June Q&A"
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The Chicago Manual of Style @chicagomanual.bsky.social · 20/05/2025
What can a book review teach us about automated source citations (and AI)? This updated post explores some of the limits of automation—and the benefits of editorial intervention—only at CMOS Shop Talk.
cmosshoptalk.com
Citing Book Reviews
Chicago-style source citations are designed to be both concise and informative. Ideally, readers should be able to tell what a citation refers to despite its abbreviated nature.
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Reposted by The Chicago Manual of Style
Hector Diaz @iamhectordiaz.com · 08/05/2025
A Chicago Pope implies the existence of an MLA Pope and APA Pope
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The Chicago Manual of Style @chicagomanual.bsky.social · 06/05/2025
Q. Should Winston-Salem be spelled with an en dash? Q. Is it “dogs have a tail” or “dogs have tails”? Q. Why is Southern California capped but not western Arizona? We answer these and other questions about Chicago style in the May Q&A at CMOS Online. cmos.style/QandA
An Australian Shepherd Border Collie mix dog jumping high in the air playing Frisbee above a green, grassy field.
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The Chicago Manual of Style @chicagomanual.bsky.social · 15/04/2025
It’s often mistaken for a hyphen, but editors know the difference. The subtle but powerful en dash is the subject of this newly updated post at CMOS Shop Talk.
cmosshoptalk.com
En Dashes, the Editor’s Mark
An en dash can function either as a strong hyphen or as an ordinary dash. As a strong hyphen, it can connect numbers or words. As an ordinary dash it’s nothing special.
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The Chicago Manual of Style @chicagomanual.bsky.social · 01/04/2025
Q. Can you omit a person’s middle initial in running text? Q. Should the word “than” be capitalized in a title? Q. Can “et al.” stand for just one person? We answer these and other questions about Chicago style in the April Q&A at CMOS Online. cmos.style/QandA
A tabby kitten announces the April CMOS Q&A while leaping full length above a grassy field and against a blue sky with the faintest wisps of cloud on the horizon
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