Currently when you render a preview on marketplace, it shows the gender/body type that you are logged in with. If you're not logged in, it shows the default gender that was uploaded first. This makes it difficult to ever see the female design from the public marketplace preview if you're either logged in as a male, or not logged in and they uploaded male version first. With a button to swap genders of the preview, users can quickly view both body types without logging in/out or changing body type.