---
title: User-defined data atom
framework: quicktime-file-format
role: symbol
role_heading: Data field
path: quicktime-file-format/track_atom/user-defined_data_atom
---

# User-defined data atom

An atom you use to define and store data associated with a QuickTime object.

## Overview

Overview For more information, see User data atoms.

## See Also

### Data fields

- [Size](quicktime-file-format/track_atom/size.md)
- [Type](quicktime-file-format/track_atom/type.md)
- [Track profile atom](quicktime-file-format/track_atom/track_profile_atom.md)
- [Track header atom](quicktime-file-format/track_atom/track_header_atom.md)
- [Track aperture mode dimensions atom](quicktime-file-format/track_atom/track_aperture_mode_dimensions_atom.md)
- [Clipping atom](quicktime-file-format/track_atom/clipping_atom.md)
- [Track matte atom](quicktime-file-format/track_atom/track_matte_atom.md)
- [Edit atom](quicktime-file-format/track_atom/edit_atom.md)
- [Track reference atom](quicktime-file-format/track_atom/track_reference_atom.md)
- [Track exclude from autoselection atom](quicktime-file-format/track_atom/track_exclude_from_autoselection_atom.md)
- [Track load settings atom](quicktime-file-format/track_atom/track_load_settings_atom.md)
- [Track input map atom](quicktime-file-format/track_atom/track_input_map_atom.md)
- [Media atom](quicktime-file-format/track_atom/media_atom.md)