---
title: unspecifiedDimension
framework: appkit
role: symbol
role_heading: Type Property
path: appkit/nssplitviewitem/unspecifieddimension
---

# unspecifiedDimension

A constant that resets a dimension’s value.

## Declaration

```swift
class let unspecifiedDimension: CGFloat
```

## Discussion

Discussion Use this constant with any sizing-related NSSplitViewItem property to reset its value to the standard system default.

## See Also

### Managing the item thickness

- [automaticMaximumThickness](appkit/nssplitviewitem/automaticmaximumthickness.md)
- [preferredThicknessFraction](appkit/nssplitviewitem/preferredthicknessfraction.md)
- [minimumThickness](appkit/nssplitviewitem/minimumthickness.md)
- [maximumThickness](appkit/nssplitviewitem/maximumthickness.md)