prs/prs.mobile/comal.timesheets/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="comal.timesheets.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="downarroww.png" HeightRequest="40" WidthRequest="40" Margin="5"
                       x:Name="collapseImage">
                    <Image.GestureRecognizers>
                        <TapGestureRecognizer Tapped="HeaderBtn_Tapped"/>
                    </Image.GestureRecognizers>
                </Image>

                <Image Grid.Column="1" Source="rightarrow.png" HeightRequest="40" WidthRequest="40" Margin="5"
                       IsVisible="false" x:Name="expandImage" VerticalOptions="Center">
                    <Image.GestureRecognizers>
                        <TapGestureRecognizer Tapped="HeaderBtn_Tapped"/>
                    </Image.GestureRecognizers>
                </Image>

                <Button Grid.Column="2" HorizontalOptions="StartAndExpand" Margin="0, 0, 40, 0" TextColor="Black"
                        BackgroundColor="DarkGray" FontAttributes="Bold" VerticalOptions="Center"
                    x:Name="headerBtn" Clicked="HeaderBtn_Tapped"/>
            </Grid>

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