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# Matrix structure

A matrix structure associated with this text media.

## Overview

This should be the identity matrix. A matrix shows how to map points from one coordinate space into another. See [Matrices](/documentation/QuickTime-File-Format/Matrices) for a discussion of how display matrices are used in QuickTime and see [`Matrix structure`](/documentation/quicktime-file-format/Movie_header_atom/Matrix_structure) for an illustration of a matrix structure within an atom.

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