Set Prototype Device by frame, not by page

It would be really helpful to have the ability to set the prototype device by frame and not by page.

So that when you’re designing a component or page and you want to preview or present prototypes to a client you can have both desktop and mobile on one page, not having to create a new page just for mobile. Then the page name could be ‘Hero banner’ or ‘Home page’ and you can have both desktop and mobile design on the same page. Just a neater workflow and neater file management.