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# NSExtensionServiceFinderPreviewIconName

The name of an icon for display when the extension appears in the Finder Preview pane and Quick Actions menu.

## Discussion

This key is used in conjunction with the [`NSExtensionServiceAllowsFinderPreviewItem`](/documentation/BundleResources/Information-Property-List/NSExtension/NSExtensionAttributes/NSExtensionServiceAllowsFinderPreviewItem) key.

Set the [`NSExtensionServiceFinderPreviewIconName`](/documentation/BundleResources/Information-Property-List/NSExtension/NSExtensionAttributes/NSExtensionServiceFinderPreviewIconName) key’s value to a system icon name or the name of an icon in the extension bundle. This icon should be a *template image*: a monochromatic image with transparency, anti-aliasing, and no drop shadow that uses a mask to define its shape. For design guidance, see [Human Interface Guidelines > macOS > Custom Icons](https://developer.apple.com/design/human-interface-guidelines/macos/icons-and-images/custom-icons/). If no icon is specified, a default icon is used.

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