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# ToolbarVerticalCompressionBehavior

A behavior that determines how bars compress when the system places different types of bars together and space is constrained.

```
struct ToolbarVerticalCompressionBehavior
```

## Overview

Use this with the [`toolbarVerticalCompressionBehavior(_:)`](/documentation/SwiftUI/View/toolbarVerticalCompressionBehavior(_:)) modifier to control which items compress first when space is limited.

## Topics

### Getting compression behavior options

[`static let automatic: ToolbarVerticalCompressionBehavior`](/documentation/SwiftUI/ToolbarVerticalCompressionBehavior/automatic)

The automatic compression behavior.

[`static let prefersTabBar: ToolbarVerticalCompressionBehavior`](/documentation/SwiftUI/ToolbarVerticalCompressionBehavior/prefersTabBar)

A compression behavior that prefers keeping the tab bar visible.

[`static let prefersToolbarItems: ToolbarVerticalCompressionBehavior`](/documentation/SwiftUI/ToolbarVerticalCompressionBehavior/prefersToolbarItems)

A compression behavior that prefers keeping toolbar items visible.

## Relationships

### Conforms To

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

[`Equatable`](/documentation/Swift/Equatable)

[`Sendable`](/documentation/Swift/Sendable)

[`Hashable`](/documentation/Swift/Hashable)

---

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