How to Decrease Height of Navigation bar in xamarin forms

I have used MasterDetail page as main page of my app. Here TabbedPage is my detail page which contain various ContentPage as children of TabbedPage. I have set Details as Detail = NavigationPage(tabbedpage); it work great for IOS but in android it occupie more space in NavigationBar title and Tabbed Name, I cannot omit both, my question is how can i reduce the height of title bar of navigation page. Please check attached image for reference.