prs/prs.mobile.new/PRS.Mobile/Components/DigitalForms/Editor/CustomUserControls/DigitalFormsHeader.xaml

<?xml version="1.0" encoding="UTF-8"?>
<ContentView xmlns="http://xamarin.com/schemas/2014/forms" 
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="PRS.Mobile.DigitalFormsHeader">
    <ContentView.Content>
        <Frame HasShadow="False" Padding="0" BackgroundColor="DarkGray">
            <Grid RowSpacing="0" ColumnSpacing="0" Padding="0">
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="40" x:Name="collapseColumn"/>
                    <ColumnDefinition Width="0" x:Name="expandColumn"/>
                    <ColumnDefinition Width="*"/>
                </Grid.ColumnDefinitions>

                <Image Grid.Column="0" Source="arrow_white_up" HeightRequest="30" WidthRequest="30" Margin="10,5,10,5"
                       x:Name="collapseImage">
                    <Image.GestureRecognizers>
                        <TapGestureRecognizer Tapped="HeaderBtn_Tapped"/>
                    </Image.GestureRecognizers>
                </Image>

                <Image Grid.Column="1" Source="arrow_white_down" HeightRequest="30" WidthRequest="30" Margin="10,5,10,5"
                       IsVisible="false" x:Name="expandImage" VerticalOptions="Center">
                    <Image.GestureRecognizers>
                        <TapGestureRecognizer Tapped="HeaderBtn_Tapped"/>
                    </Image.GestureRecognizers>
                </Image>

                <Label
                    Grid.Column="2" 
                    FontSize="Small" 
                    x:Name="headerBtn"
                    FontAttributes="Bold"
                    VerticalTextAlignment="Center"
                    HorizontalTextAlignment="Center"
                    HorizontalOptions="Fill"
                    TextColor="White">
                    <Label.GestureRecognizers>
                        <TapGestureRecognizer Tapped="HeaderBtn_Tapped"/>
                    </Label.GestureRecognizers>
                </Label>
            </Grid>

        </Frame>
    </ContentView.Content>
</ContentView>