---
title: duration
framework: Immersive Media Support
role: symbol
role_heading: Instance Property
platforms: [iOS 26.4+, iPadOS 26.4+, Mac Catalyst 26.4+, macOS 26.0+, visionOS 26.0+]
path: immersivemediasupport/fadeenvironmentcommand/duration
---

# duration

The duration of the command - this can be .zero if the command has no duration

## Declaration

```swift
var duration: CMTime
```

## See Also

### Instance Properties

- [direction](immersivemediasupport/fadeenvironmentcommand/direction.md)
- [id](immersivemediasupport/fadeenvironmentcommand/id.md)
- [offset](immersivemediasupport/fadeenvironmentcommand/offset.md)
- [opacity](immersivemediasupport/fadeenvironmentcommand/opacity.md)
- [time](immersivemediasupport/fadeenvironmentcommand/time.md)