1. This is not how the theme functions by default, so it would require customization on your part if you were looking to do this. So "Can you?", technically yes, but this would be of your own doing.
2. Documentation for Vantage can be found
here (some with video tutorials included), with all support for our themes carried out within the members forums. AppThemes does not officially support customizations, so questions of that nature are subject to community based support.
3. Currently no, this is not available. Thanks.