Xamarin Layout design issues with rotation

I am really new to Xaml development, hence this question. I am trying to build a screen like below in the Xamarin forms : I have tried to use following code <StackLayout> <StackLayout VerticalOptions=”Start” BackgroundColor=”Gray”> <Label Text=”Welcome to Xamarin.Top!” HorizontalOptions=”Center” VerticalOptions=”CenterAndExpand” /> </StackLayout> <StackLayout VerticalOptions=”StartAndExpand” BackgroundColor=”Blue”> <!– middle controls –> <Label Text=”Welcome to Xamarin.Middle!” HorizontalOptions=”Center”…

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