<NavigationView
        x:Name="navMain"
        IsBackButtonVisible="Collapsed"
        IsSettingsVisible="False"
        IsTabStop="False"
        PaneDisplayMode="Top">
        <NavigationView.MenuItems>
            <NavigationViewItem
                Content="ITEM 1"
                FontSize="60"
                Tag="Page1" />
            <NavigationViewItem
                Content="ITEM2"
                FontSize="60"
                Tag="Page2" />
            <NavigationViewItem
                Content="ITEM 3"
                FontSize="60"
                Tag="Page3" />
        </NavigationView.MenuItems>
</NavigationView>