Writing Caption Emphasis
Writing Caption Emphasis records a distinct W3C-supported caption-writing task while keeping implementation mechanics and unsupported house-style rules outside the guidance.
Do not use all capital letters merely to emphasize a word in captions; W3C WAI lists all caps as a cue for yelling.
Key details
Important caveats
Scope Boundary
The guidance is about caption wording conventions, not every visual styling mechanism a player may support.
Further guidance
Content
Keep ordinary emphasis out of all caps; reserve all-cap styling for the narrow speech cue documented for yelling when that distinction matters.
Purpose
This avoids turning ordinary emphasis into a false vocal cue while still conveying relevant delivery.
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.
- Transcribing Audio to Text — W3C WAI (opens in a new tab)World Wide Web Consortium (W3C) Web Accessibility Initiative · W3C WAI guidance for identifying speakers and representing relevant audio information in transcripts and captions.