---
title: "Subtitle style atom ('styl')"
framework: quicktime-file-format
role: symbol
role_heading: Atom
path: quicktime-file-format/subtitle_style_atom
---

# Subtitle style atom ('styl')

An atom that specifies changes to the appearance of a subtitle.

## Overview

Overview This extension specifies changes to the appearance of a subtitle. The style information in the subtitle sample description provides the default style for the subtitle text. This extension allows you to override the default style for different parts, or all, of the subtitle text.

## Topics

### Data fields

- [Size](quicktime-file-format/subtitle_style_atom/size.md)
- [Type](quicktime-file-format/subtitle_style_atom/type.md)
- [Entry count](quicktime-file-format/subtitle_style_atom/entry_count.md)
- [Subtitle text style record](quicktime-file-format/subtitle_style_atom/subtitle_text_style_record.md)

## See Also

### Storing subtitles

- [Subtitle sample description](quicktime-file-format/subtitle_sample_description.md)
- [Font table atom ('ftab')](quicktime-file-format/font_table_atom.md)
- [Subtitle sample data](quicktime-file-format/subtitle_sample_data.md)
- [Text box atom ('tbox')](quicktime-file-format/text_box_atom.md)
- [Subtitle track header size and placement](quicktime-file-format/subtitle_track_header_size_and_placement.md)
- [Referencing a related forced subtitle track](quicktime-file-format/referencing_a_related_forced_subtitle_track.md)