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# UNNotificationAttachmentOptionsThumbnailHiddenKey

A Boolean value indicating whether the system hides the attachment’s thumbnail.

```
let UNNotificationAttachmentOptionsThumbnailHiddenKey: String
```

## Discussion

The value of this key is an <doc://com.apple.documentation/documentation/Foundation/NSNumber> containing a Boolean value. When set to <doc://com.apple.documentation/documentation/Swift/true>, the attachment’s thumbnail isn’t displayed. If you don’t include this key, the system shows the thumbnail.

---

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