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# maskAmount

The amount by which to mask the cells in a collection view.

```
var maskAmount: CGFloat { get set }
```

## Discussion

Use the `maskAmount` property to change how much masking the collection view applies to its cells. Setting the value of the property on the layout updates the `maskAmount` value of all the cells.

This property can take on a float value between `0` and `1.0`. A value of `0` indicates that the cells are full-screen, and a value of `1.0` indicates that the collection view applies the full mask to its cells.

The default value of this property is `1.0`.

![Diagrams showing a fully masked cell with a maskAmount value of 1.0, and an unmasked cell with a maskAmount value of 0.0.](images/com.apple.tvuikit/media-4142366@2x.png)

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