title: Can't see TabItem content in Expression Blend
body: <p>So here is my problem. I have a WPF application basically composed of a TabControl with many TabItems. I have each TabItem declared in separated classes, and what I do is insert them into the TabControl of the MainWindow like this:</p>
  
  <pre><code>&lt;TabControl x:Name="tabCtrl" Grid.Column="2" Margin="89.765,29.697,89.766,33.697"
              Style="{DynamicResource TabControlStyle1}" TabStripPlacement="Left"
              SelectionChanged="tabCtrl_SelectionChanged"&gt;
          &lt;TabControl.Background&gt;
              &lt;SolidColorBrush Color="#FFF9F9F9" Opacity="0.6"/&gt;
          &lt;/TabControl.Background&gt;
          &lt;local:WelcomeTab Width="Auto" Height="Auto" x:Name="welcomeTab"/&gt;
          &lt;local:Step1Tab Width="Auto" Height="Auto" x:Name="step1Tab"/&gt;
          &lt;local:Step2Tab Width="Auto" Height="Auto" x:Name="step2Tab"/&gt;
          &lt;local:Step3Tab Width="Auto" Height="Auto" x:Name="step3Tab"/&gt;
          &lt;local:Step4Tab Width="Auto" Height="Auto" x:Name="step4Tab"/&gt;
  &lt;/TabControl&gt;
  </code></pre>
  
  <p>I use Expression Blend to edit the tabs, and as I'm using this method, I have to edit each tab in their own class. The problem is that when I want to do it, I must do it directly in the XAML because all I see of the TabItem is the header.</p>
  
  <p>The XAML of this tab, for example, is something like this:</p>
  
  <pre><code>&lt;TabItem x:Class="Foo.Step1Tab"
           xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
           xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
           xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
           xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
           mc:Ignorable="d" 
           xmlns:Microsoft_Windows_Themes="clr-namespace:Microsoft.Windows.Themes;assembly=PresentationFramework.Aero"
           xmlns:p="clr-namespace:Foo.Properties"
           x:Name="step1Tab" IsEnabled="true"
           IsManipulationEnabled="True"
           d:DesignHeight="300" d:DesignWidth="300" Header="{x:Static p:Resources.step1Tab}" Style="{DynamicResource TabItemStyle1}"&gt;
      &lt;Content of the tab&gt;
  &lt;/TabItem&gt;
  </code></pre>
  
  <p>Is there anything I can do to be able to see the elements of the tab and manipulate them?</p>