---
title: NSExtensionMainStoryboard
framework: bundleresources
role: symbol
role_heading: Property List Key
path: bundleresources/information-property-list/nsextension/nsextensionmainstoryboard
---

# NSExtensionMainStoryboard

The name of the app extension’s main storyboard file.

## Discussion

Discussion This key is mutually exclusive with NSExtensionPrincipalClass. Typically, Xcode sets the value of this key when creating an App Extension target in your project. If you change the name of your storyboard file, remember to update the value of this key. important: If the app extension’s Info.plist file contains both keys, the system won’t load the extension.

## See Also

### Appearance and Presentation

- [NSExtensionActionWantsFullScreenPresentation](bundleresources/information-property-list/nsextension/nsextensionactionwantsfullscreenpresentation.md)
- [NSExtensionOverridesHostUIAppearance](bundleresources/information-property-list/nsextension/nsextensionoverrideshostuiappearance.md)
- [NSExtensionPointIdentifier](bundleresources/information-property-list/nsextension/nsextensionpointidentifier.md)
- [NSExtensionPrincipalClass](bundleresources/information-property-list/nsextension/nsextensionprincipalclass.md)