---
title: "supplementalActivityFamilies(_:)"
framework: swiftui
role: symbol
role_heading: Instance Method
path: "swiftui/widgetconfiguration/supplementalactivityfamilies(_:)"
---

# supplementalActivityFamilies(_:)

Sets the sizes that a Live Activity supports.

## Declaration

```swift
@MainActor @preconcurrency func supplementalActivityFamilies(_ families: [ActivityFamily]) -> some WidgetConfiguration

```

## Parameters

- `families`: The supplemental families supported by this live activity.

## Discussion

Discussion For more information, refer to WidgetKit/ActivityFamily