---
title: thumbnailDictionary
framework: foundation
role: symbol
role_heading: Instance Property
path: foundation/urlresourcevalues/thumbnaildictionary-4ztst
---

# thumbnailDictionary

A dictionary of AppKit image objects keyed by size.

## Declaration

```swift
var thumbnailDictionary: [URLThumbnailDictionaryItem : NSImage]? { get }
```

## See Also

### Thumbnail values

- [thumbnail](foundation/urlresourcevalues/thumbnail.md)
- [thumbnailDictionary](foundation/urlresourcevalues/thumbnaildictionary-7jyzz.md)