---
title: alpha
framework: appkit
role: symbol
role_heading: Instance Property
path: appkit/nscollectionviewlayoutattributes/alpha
---

# alpha

The transparency of the element.

## Declaration

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

## Discussion

Discussion Possible values are between 0.0 (fully transparent) and 1.0 (fully opaque). The default value is 1.0. Transparent items continue to participate in hit testing for the collection view.

## See Also

### Accessing the Layout Attributes

- [frame](appkit/nscollectionviewlayoutattributes/frame.md)
- [size](appkit/nscollectionviewlayoutattributes/size.md)
- [isHidden](appkit/nscollectionviewlayoutattributes/ishidden.md)
- [zIndex](appkit/nscollectionviewlayoutattributes/zindex.md)