Modern UI - Few Queries on Customization

Feb 10, 2015 at 6:57 PM

I have recently started using Modern UI and have few queries on customization part.
  1. Is there a way to hide close button of Modern Window?
  2. Is it possible to hide the back button?
  3. Is it possible to disable the Menu LinkGroups?
  4. Is there a way to have Sub Menu when I click on the MenuLink group?
Please can someone reply on this asap?