Use this property to set the target Help file for context-sensitive Help for pages objects, report objects, and XMLport objects in your solution.
Page extension objects
ContextSensitiveHelpPage = 'page-extension-topic';
The value of this property forms the second half of the URL to context-sensitive Help for your app. The first half is set in the app.json where you specify the URL to your library of Learn More content. For more information, see Configure Context-Sensitive Help.