---
title: NSWindow.DidChangeBackingPropertiesMessage
framework: appkit
role: symbol
role_heading: Structure
path: appkit/nswindow/didchangebackingpropertiesmessage
---

# NSWindow.DidChangeBackingPropertiesMessage

## Declaration

```swift
struct DidChangeBackingPropertiesMessage
```

## Topics

### Initializers

- [init(window:oldScaleFactor:oldColorSpace:)](appkit/nswindow/didchangebackingpropertiesmessage/init(window:oldscalefactor:oldcolorspace:).md)

### Instance Properties

- [oldColorSpace](appkit/nswindow/didchangebackingpropertiesmessage/oldcolorspace.md)
- [oldScaleFactor](appkit/nswindow/didchangebackingpropertiesmessage/oldscalefactor.md)
- [window](appkit/nswindow/didchangebackingpropertiesmessage/window.md)

## Relationships

### Conforms To

- [NotificationCenter.MainActorMessage](foundation/notificationcenter/mainactormessage.md)
- [SendableMetatype](swift/sendablemetatype.md)