---
title: "applicationDidChangeScreenParameters(_:)"
framework: appkit
role: symbol
role_heading: Instance Method
path: "appkit/nsapplicationdelegate/applicationdidchangescreenparameters(_:)"
---

# applicationDidChangeScreenParameters(_:)

Tells the delegate about changes to the configuration of any attached displays.

## Declaration

```swift
@MainActor optional func applicationDidChangeScreenParameters(_ notification: Notification)
```

## Parameters

- `notification`: A notification named doc://com.apple.appkit/documentation/AppKit/NSApplication/didChangeScreenParametersNotification. Calling the doc://com.apple.documentation/documentation/Foundation/NSNotification/object method of this notification returns the NSApplication object itself.