8.168 Hyphenated compounds in titles. Two options for capitalizing a hyphenated compound in headline style are offered here—first, a simple rule (see 8.169), beloved of some but disdained by others, and second, a complex but more traditional set of rules (see 8.170). Contrary to practice elsewhere in this manual, the first option, requiring a single paragraph, precedes the one generally preferred by Chicago.
8.169 Hyphenation: the simple rule. Capitalize only the first element unless any subsequent element is a proper noun or adjective.
Death-defying feats by Nineteenth-century Tightrope Walkers
An All-American Girl: How a Non-English-speaking Immigrant Made Good
8.170 Hyphenation: the more traditional rules. (1) Always capitalize the first element. (2) Capitalize any subsequent elements unless they are articles, prepositions, coordinating conjunctions (and, but, for, or, nor) or such modifiers as flat or sharp following musical key symbols. (3) If the first element is merely a prefix or combining form that could stand by itself as a word (anti, pre, etc.), do not capitalize te second element unless it is a proper noun or proper adjective. (4) Do not capitalize the second element in a hyphenated spelled out number (twenty-one, etc.). (5) Break a rule when it doesn’t work (see the last three examples below).
Under-the-Counter Transactions and Out-of-Fashion Initiatives
Sugar-and-Spice Stories for Girls or Boys
Record-Breaking Borrowings from Medium-Sized Libraries
Cross-Stitching for Beginners
The E-flat Concerto
A Two-thirds Majority of Non-English Speaking Representatives
Does E-mail Alter Speech Patterns?
Lolita’s Twenty-first Birthday
A History of the Chicago Lying-in Hospital
Twenty-First Century History (first, if lowercased, would look inconsistent here)
Hand-me-downs and Forget-me-nots (lowercase short and unstressed elements)
Run-ins ad Take-offs (lowercase short and unstressed elements)