---
title: kIOSurfaceContentHeadroom
framework: IOSurface
role: symbol
role_heading: Global Variable
platforms: [iOS 18.0+, iPadOS 18.0+, Mac Catalyst 18.0+, macOS 15.0+, tvOS 18.0+, visionOS 2.0+]
path: iosurface/kiosurfacecontentheadroom
---

# kIOSurfaceContentHeadroom

## Declaration

```swift
let kIOSurfaceContentHeadroom: CFString
```