---
title: expansion
framework: foundation
role: symbol
role_heading: Instance Property
path: foundation/attributescopes/appkitattributes/expansion
---

# expansion

A property for accessing an expansion attribute.

## Declaration

```swift
let expansion: AttributeScopes.AppKitAttributes.ExpansionAttribute
```

## See Also

### Using Attachments and Expansions

- [attachment](foundation/attributescopes/appkitattributes/attachment.md)