---
title: automaticDimension
framework: appkit
role: symbol
role_heading: Type Property
path: appkit/nssplitviewcontroller/automaticdimension
---

# automaticDimension

The default value to apply to a dimension.

## Declaration

```swift
class let automaticDimension: CGFloat
```

## Discussion

Discussion Use this constant with any sizing-related NSSplitViewController property to get the default system behavior.

## See Also

### Managing Sidebars

- [toggleSidebar(_:)](appkit/nssplitviewcontroller/togglesidebar(_:).md)
- [minimumThicknessForInlineSidebars](appkit/nssplitviewcontroller/minimumthicknessforinlinesidebars.md)