---
title: minimumThickness
framework: appkit
role: symbol
role_heading: Instance Property
path: appkit/nssplitviewitem/minimumthickness
---

# minimumThickness

The minimum thickness of the split view item.

## Declaration

```swift
var minimumThickness: CGFloat { get set }
```

## Discussion

Discussion This value affects the split view item’s width (for a vertical split view) or height (for a horizontal split view). The default value of this property is unspecifiedDimension, which means the split view item doesn’t enforce a minimum size. However, layout constraints in the contained view hierarchy might specify a minimum size regardless.

## See Also

### Managing the item thickness

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