# init(_:for:contentType:prepareDocument:) ``` @export(implementation) nonisolated init(_ title: LocalizedStringResource, for documentType: D.Type = D.self, contentType: UTType? = nil, prepareDocument: @escaping () async throws -> D? = { nil }) where D : FileDocument ``` ## Parameters `title` A title resource for the button. `documentType` A type of the document to create. `contentType` An optional content type of the document to create. `prepareDocument` A closure is called when a user presses the button. At this point, you can present a document template picker or another UI that allows users to choose a theme, configuration, or a template to create a document from. Return a prepared document, or throw an error if document creation failed. Return `nil` to request creation of an empty document. --- 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)