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# NSApplication.RequestUserAttentionType

These constants specify the level of severity of a user attention request and are used by [`cancelUserAttentionRequest(_:)`](/documentation/AppKit/NSApplication/cancelUserAttentionRequest(_:)) and [`requestUserAttention(_:)`](/documentation/AppKit/NSApplication/requestUserAttention(_:)).

```
enum RequestUserAttentionType
```

## Topics

### Constants

[`NSApplication.RequestUserAttentionType.criticalRequest`](/documentation/AppKit/NSApplication/RequestUserAttentionType/criticalRequest)

The user attention request is a critical request.

[`NSApplication.RequestUserAttentionType.informationalRequest`](/documentation/AppKit/NSApplication/RequestUserAttentionType/informationalRequest)

The user attention request is an informational request.


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