title: How can I change the fontsize of a GridviewColumnHeader?
body: <p>I included everything below since it's not that much. I wasn't sure if something I put elsewhere was causing my setter to not work properly.</p>
  
  <pre><code>                &lt;ListView x:Name="lvReports"
                               SelectionMode="Single"
                               ItemsSource="{Binding reportsCollection}" Height="432" ScrollViewer.HorizontalScrollBarVisibility="Hidden"&gt;
                      &lt;ListView.Resources&gt;
                          &lt;Style x:Key="myHeaderStyle" TargetType="{x:Type GridViewColumnHeader}"&gt;
                              &lt;Setter Property="HorizontalContentAlignment" Value="Left"/&gt;
                              &lt;Setter Property="TextElement.FontSize" Value="30pt"/&gt;
                              &lt;Setter Property="Width" Value="800"/&gt;
                          &lt;/Style&gt;
                      &lt;/ListView.Resources&gt;
                      &lt;ListView.GroupStyle&gt;
                          &lt;GroupStyle&gt;
                              &lt;GroupStyle.HeaderTemplate&gt;
                                  &lt;DataTemplate&gt;
                                      &lt;DockPanel&gt;
                                          &lt;DockPanel Height="30" VerticalAlignment="Bottom"&gt;
                                              &lt;Image Source="\Images\ProductivityByEmployeesReport.png"/&gt;
                                              &lt;TextBlock FontWeight="Bold" FontSize="18pt" Text="{Binding Path=Name}"/&gt;
                                          &lt;/DockPanel&gt;
                                      &lt;/DockPanel&gt;
                                  &lt;/DataTemplate&gt;
                              &lt;/GroupStyle.HeaderTemplate&gt;
                          &lt;/GroupStyle&gt;
                      &lt;/ListView.GroupStyle&gt;
                      &lt;ListView.View&gt;
                          &lt;GridView&gt;
                              &lt;GridViewColumn x:Name="colName" HeaderContainerStyle="{StaticResource myHeaderStyle}" Header="Reports"&gt;
                                  &lt;GridViewColumn.CellTemplate&gt;
                                      &lt;DataTemplate&gt;
                                          &lt;DockPanel&gt;
                                              &lt;Rectangle Width="18"/&gt;
                                              &lt;CheckBox&gt;
                                                  &lt;TextBlock Text="{Binding displayName}"/&gt;
                                              &lt;/CheckBox&gt;
                                          &lt;/DockPanel&gt;
                                      &lt;/DataTemplate&gt;
                                  &lt;/GridViewColumn.CellTemplate&gt;
                              &lt;/GridViewColumn&gt;
                          &lt;/GridView&gt;
                      &lt;/ListView.View&gt;
                  &lt;/ListView&gt;
  </code></pre>
  
  <p>Thanks in advance.</p>