<StackLayout Padding="0,30,0,0">
        <Label Text="Image Button"
               FontSize="50"
               FontAttributes="Bold"/>

       <ImageButton Source="xamarinRocket.png"
                    Margin="20,0,20,0"
                    BorderWidth="1"
                    BorderColor="Red"
                    HeightRequest="200"
                    WidthRequest="200"/>

        </StackLayout>