prs/prs.mobile.new/PRS.Mobile/Components/DocumentList/DocumentPage.xaml

<?xml version="1.0" encoding="utf-8"?>

<mobile:MobilePage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:mobile="clr-namespace:InABox.Mobile;assembly=InABox.Mobile.Shared"
             xmlns:local="clr-namespace:PRS.Mobile;assembly=PRS.Mobile"
             x:Class="PRS.Mobile.DocumentPage">
    
    <mobile:MobilePage.PrimaryMenu>
        <mobile:MobileMenuButton x:Name="_launch" Image="more" Clicked="_launch_Click" />
    </mobile:MobilePage.PrimaryMenu>
    
    <mobile:MobilePage.PageContent>
        <Grid>
            
            <local:DocumentViewer
                x:Name="_viewer" 
                IsVisible="False"
                ShowFileName="False"
                DocumentLoaded="_viewer_DocumentLoaded"
                Margin="5"/>

            <Label 
                x:Name="_noviewer"
                FontSize="Medium"
                Text="File Not Available!"
                HorizontalOptions="Fill"
                HorizontalTextAlignment="Center"
                VerticalOptions="Fill"
                VerticalTextAlignment="Center"
                IsVisible="False"/>
                
        </Grid>
    </mobile:MobilePage.PageContent>
</mobile:MobilePage>