# availablePreviewPhotoPixelFormatTypes An array of pixel format types compatible with the photo settings for delivery of preview-sized images. ``` @property (nonatomic, readonly) NSArray * availablePreviewPhotoPixelFormatTypes; ``` ## Discussion To enable delivery of preview-sized images along with the main image captured by a photo output, set the [`previewPhotoFormat`](/documentation/AVFoundation/AVCapturePhotoSettings/previewPhotoFormat) property using one of the values listed in this array. The order of this array is such that the format requiring the least conversion is listed first. --- 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)