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# AVCaptionUnitsType

A structure that defines a units for caption formats.

```
enum AVCaptionUnitsType
```

## Overview

Some geometry values may use sizing and positioning with different units. In some cases, an object might allow multiple kinds of dimensions varying by units.

## Topics

### Unit types

[`AVCaptionUnitsType.cells`](/documentation/AVFoundation/AVCaptionUnitsType/cells)

A cell-based unit type.

[`AVCaptionUnitsType.percent`](/documentation/AVFoundation/AVCaptionUnitsType/percent)

A percentage-based unit type.

[`AVCaptionUnitsType.unspecified`](/documentation/AVFoundation/AVCaptionUnitsType/unspecified)

An unspecified unit type.


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