---
title: disclosureButtonIdentifier
framework: appkit
role: symbol
role_heading: Type Property
path: appkit/nsoutlineview/disclosurebuttonidentifier
---

# disclosureButtonIdentifier

The normal triangle disclosure button.

## Declaration

```swift
class let disclosureButtonIdentifier: NSUserInterfaceItemIdentifier
```

## See Also

### Constants

- [showHideButtonIdentifier](appkit/nsoutlineview/showhidebuttonidentifier.md)