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  "title" : "Preview atom ('pnot')"
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# Preview atom ('pnot')

An atom that contains information that allows you to find the preview image associated with a QuickTime movie.

## Overview

The preview image, or poster, is a representative image suitable for display to the user in, for example, Open dialog boxes.

The preview atom has an atom type value of `'pnot'`.

## Topics

### Atom fields

[`Size`](/documentation/quicktime-file-format/Preview_atom/Size)

A 32-bit integer that specifies the number of bytes in this preview atom.

[`Type`](/documentation/quicktime-file-format/Preview_atom/Type)

A 32-bit integer that identifies the atom type.

[`Modification date`](/documentation/quicktime-file-format/Preview_atom/Modification_date)

A 32-bit unsigned integer containing a date that indicates when the preview was last updated.

[`Version number`](/documentation/quicktime-file-format/Preview_atom/Version_number)

A 16-bit integer

[`Atom type`](/documentation/quicktime-file-format/Preview_atom/Atom_type)

A 32-bit integer that indicates the type of atom that contains the preview data.

[`Atom index`](/documentation/quicktime-file-format/Preview_atom/Atom_index)

A 16-bit integer that identifies which atom of the specified type is to be used as the preview.


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