---
title: chromaLocationTopField
framework: coremedia
role: symbol
role_heading: Type Property
path: coremedia/cmformatdescription/extensions-swift.struct/key/chromalocationtopfield
---

# chromaLocationTopField

## Declaration

```swift
static let chromaLocationTopField: CMFormatDescription.Extensions.Key
```

## See Also

### Extension Keys

- [alphaChannelMode](coremedia/cmformatdescription/extensions-swift.struct/key/alphachannelmode.md)
- [alternativeTransferCharacteristics](coremedia/cmformatdescription/extensions-swift.struct/key/alternativetransfercharacteristics.md)
- [ambientViewingEnvironment](coremedia/cmformatdescription/extensions-swift.struct/key/ambientviewingenvironment.md)
- [auxiliaryTypeInfo](coremedia/cmformatdescription/extensions-swift.struct/key/auxiliarytypeinfo.md)
- [backgroundColor](coremedia/cmformatdescription/extensions-swift.struct/key/backgroundcolor.md)
- [bitsPerComponent](coremedia/cmformatdescription/extensions-swift.struct/key/bitspercomponent.md)
- [bytesPerRow](coremedia/cmformatdescription/extensions-swift.struct/key/bytesperrow.md)
- [chromaLocationBottomField](coremedia/cmformatdescription/extensions-swift.struct/key/chromalocationbottomfield.md)
- [cleanAperture](coremedia/cmformatdescription/extensions-swift.struct/key/cleanaperture.md)
- [colorPrimaries](coremedia/cmformatdescription/extensions-swift.struct/key/colorprimaries.md)
- [conformsToMPEG2VideoProfile](coremedia/cmformatdescription/extensions-swift.struct/key/conformstompeg2videoprofile.md)
- [containsAlphaChannel](coremedia/cmformatdescription/extensions-swift.struct/key/containsalphachannel.md)
- [contentLightLevelInfo](coremedia/cmformatdescription/extensions-swift.struct/key/contentlightlevelinfo.md)
- [defaultFontName](coremedia/cmformatdescription/extensions-swift.struct/key/defaultfontname.md)
- [defaultStyle](coremedia/cmformatdescription/extensions-swift.struct/key/defaultstyle.md)