---
title: document
framework: AVFoundation
role: symbol
role_heading: Type Property
platforms: [iOS 27.0+, iPadOS 27.0+, Mac Catalyst 27.0+, tvOS 27.0+]
path: avfoundation/avcapturedeviceexposuresignal/document
---

# document

When enabled, auto exposure may close the aperture to improve sharpness of textual scenes.

## Declaration

```swift
static let document: AVCaptureDeviceExposureSignal
```

## See Also

### Exposure signals

- [flicker](avfoundation/avcapturedeviceexposuresignal/flicker.md)
- [groupPhoto](avfoundation/avcapturedeviceexposuresignal/groupphoto.md)
- [starburst](avfoundation/avcapturedeviceexposuresignal/starburst.md)
- [subjectMotion](avfoundation/avcapturedeviceexposuresignal/subjectmotion.md)