Linking Application Help to a UD form

He have a customization on a UD form. I’d like to add in an annotation to the help related to that form. When you click on F1 you just get the default Getting Started page.

I’m not sure if it is possible that you can link a UD form to application help so we can achieve this, is it possible without the SDK?

Or is this a situation you are better of hijack the application help menu item in the custom form and open a web page to the linked document? Then at least you only need to manage it in one place.