Writing & StyleStyle guide

Capitalization After a Colon in Headings

Capitalization After a Colon in Headings records Microsoft’s explicit sentence-style heading exception for the first word after a colon.

Quick answer

In Microsoft-style headings, capitalize the first word after a colon even though the heading otherwise follows sentence-style capitalization.

Key details

Core IssueUnder Microsoft sentence-style capitalization, if a title or heading contains a colon, capitalize the first word after the colon.
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Important caveats

Scope Boundary

This is Microsoft heading style; other style guides can use different capitalization rules after colons.

Further guidance

Content

In a Microsoft-style title or heading with a colon, capitalize the first word after the colon while otherwise following sentence-style capitalization.

Practical Application

When following Microsoft-style sentence-case headings, capitalize the first word after a colon while keeping other ordinary words lowercase unless they independently require capitals. Treat this as a house-style rule, not a universal English rule.

Purpose

Preserve the house style’s heading boundary after a colon.

Reader Check

After the colon, is the first word capitalized, and are any later capitals justified by proper names, acronyms, or another explicit rule?

Worked Example

Microsoft-style: “Deployment options: Choose a configuration.” A different publisher may specify another treatment, so do not normalize across styles without checking.

Sources and evidence

Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.

  1. Capitalization — Microsoft Style Guide (opens in a new tab)Microsoft · Microsoft technical-style guidance for sentence-style headings, acronym expansion capitalization and capitalization after colons

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