---
title: kAXZoomButtonSubrole
framework: applicationservices
role: symbol
role_heading: Global Variable
path: applicationservices/kaxzoombuttonsubrole
---

# kAXZoomButtonSubrole

A zoom button (that is, the green button in a window’s title bar that adjusts the window’s size).

## Declaration

```swift
var kAXZoomButtonSubrole: String { get }
```