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# opacity(_:)

Sets the transparency of the view.

```
func opacity(_ opacity: Double) -> some VisualEffect
```

## Parameters

`opacity`

A value between 0 (fully transparent) and 1 (fully
opaque).

## Return Value

An effect that sets the transparency of the view.

## Discussion

When applying the `opacity(_:)` effect to a view that has already had
its opacity transformed, the effect of the underlying opacity
transformation is multiplied.

---

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