# DocumentThumbnail A structure that contains an image of an entire page or a portion of a page and the ID of the page the image is from. ``` struct DocumentThumbnail where Document : MergeableDocument ``` ## Topics ### Getting the page identifier [`var pageID: Document.Page.ID`](/documentation/Assignables/DocumentThumbnail/pageID) The ID of the page this thumbnail is for. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)