As a debug aid, there is the <l:AlertTriggerView /> control that displays incoming alerts. It is in commented out on the Start page in Fred4_TabItems, so uncomment it and reimport if you want to use it.
It is very basic at the moment and is only meant as a debugging aid for the developers.
An example of the Start main tab code in Fred4_Tabitems.xml with the AlertTriggerView uncommented and the sample internet page commented out (by default the sample internet page is active, but you can comment it out to put the alert trigger view:
<l:ShellTabItem
x:Name="StartMainTab"
Header="Start"
MenuConfigName="StartMainTab"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:converters="clr-namespace:TeraDP.GN4.Common.Converters;assembly=Common"
l:ShellUI.ZoneName="Main" Grid.IsSharedSizeScope="True">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<ScrollViewer Margin="2"
HorizontalScrollBarVisibility="Disabled"
VerticalScrollBarVisibility="Auto" MaxWidth="400">
<StackPanel Orientation="Vertical">
<l:CommandLink Instruction="Articles" Description="View, Create and Modify Articles." Command="{x:Static l:Commands.Script}" CommandParameter="AddArticlesTabItem" />
<l:CommandLink Instruction="The Shell" Description="The Shell." Command="{x:Static l:Commands.Script}" CommandParameter="AddShellMainTab" />
<l:CommandLink Instruction="Publishing" Description="Manipulate Publishing Content." Command="{x:Static l:Commands.Script}" CommandParameter="AddPublishingTabItem" />
<l:CommandLink Instruction="Contacts" Description="View and Edit Contacts." Command="{x:Static l:Commands.Script}" CommandParameter="AddContactsTabItem" />
<l:CommandLink Instruction="Planning" Description="Manage Budgets, Events and Tasks." Command="{x:Static l:Commands.Script}" CommandParameter="AddPlanningMainTab" />
<l:CommandLink Instruction="Collections" Description="Manage Collections." Command="{x:Static l:Commands.Script}" CommandParameter="AddCollectionsMainTab" />
<l:CommandLink Instruction="Pages" Description="View and Edit Editorial Pages." Command="{x:Static l:Commands.Script}" CommandParameter="AddPagesTabItem" />
<l:CommandLink Instruction="Editions" Description="View, Create and Modify Editions." Command="{x:Static l:Commands.Script}" CommandParameter="AddEditionsTabItem" />
<l:CommandLink Instruction="Tracking" Description="View Edition and Page status." Command="{x:Static l:Commands.Script}" CommandParameter="AddTracyTabItem" />
<l:CommandLink Instruction="Trash can" Description="Recover spiked items." Command="{x:Static l:Commands.Script}" CommandParameter="AddTrashCanTabItem" />
<l:CommandLink Instruction="Reports" Description="Generate Reports." Command="{x:Static l:Commands.Script}" CommandParameter="AddReportTabItem" />
</StackPanel>
</ScrollViewer>
<!-- customize the external web url -->
<l:AlertTriggerView Grid.Column="1"/>
<!--<WebBrowser Grid.Column="1" x:Name="webBrowser"
Source="http://www.miles33.com"
HorizontalAlignment="Stretch"
VerticalAlignment="Stretch" />-->
</Grid>
</l:ShellTabItem>