---
title: "Clipping region atom ('crgn')"
framework: quicktime-file-format
role: symbol
role_heading: Atom
path: quicktime-file-format/clipping_region_atom
---

# Clipping region atom ('crgn')

An atom that specifies the clipping region.

## Overview

Overview The clipping region atom contains the data that specifies the clipping region, including its size, bounding box, and region. Clipping region atoms have an atom type value of 'crgn'. The layout of the clipping region atom is as follows.  |   |   |   |   |   |

## Topics

### Data fields

- [Size](quicktime-file-format/clipping_region_atom/size.md)
- [Type](quicktime-file-format/clipping_region_atom/type.md)
- [Region size](quicktime-file-format/clipping_region_atom/region_size.md)
- [Region boundary box](quicktime-file-format/clipping_region_atom/region_boundary_box.md)
- [Clipping region data](quicktime-file-format/clipping_region_atom/clipping_region_data.md)

## See Also

### Describing tracks

- [Track atom ('trak')](quicktime-file-format/track_atom.md)
- [Track header atom ('tkhd')](quicktime-file-format/track_header_atom.md)
- [Track exclude from autoselection atom ('txas')](quicktime-file-format/track_exclude_from_autoselection_atom.md)
- [Track aperture mode dimension atoms](quicktime-file-format/track_aperture_mode_dimension_atoms.md)
- [Clipping atom ('clip')](quicktime-file-format/clipping_atom.md)
- [Track matte atom ('matt')](quicktime-file-format/track_matte_atom.md)
- [Compressed matte atom ('kmat')](quicktime-file-format/compressed_matte_atom.md)
- [Edit atom ('edts')](quicktime-file-format/edit_atom.md)
- [Edit list atom ('elst')](quicktime-file-format/edit_list_atom.md)
- [Playing with edit lists](quicktime-file-format/playing_with_edit_lists.md)
- [Track load settings atom ('load')](quicktime-file-format/track_load_settings_atom.md)
- [Track reference atoms](quicktime-file-format/track_reference_atoms.md)
- [Track input map atoms](quicktime-file-format/track_input_map_atoms.md)