Paragraph FontWeight

<FlowDocument
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" FontFamily="Arial"
  FontSize="24" PagePadding="30" Background="White" Name="fd1">
  <Paragraph>
    <Figure Width="Content" HorizontalAnchor="ContentLeft"
      VerticalAnchor="ContentTop" Margin="0,0,0,20" Padding="0">
      <Paragraph FontSize="36" Margin="0" FontWeight="Bold">Superman</Paragraph>
      <Paragraph Margin="0">Superman</Paragraph>
    </Figure>
    Superman
  </Paragraph>
  <Paragraph>
    Superman
    </Paragraph>
  <Paragraph>
    Superman
    </Paragraph>
  <Paragraph>
    Superman
    </Paragraph>
  <Paragraph FontWeight="Bold">
    Superman
    </Paragraph>
  <Paragraph>
    sSuperman
    </Paragraph>
  <Paragraph>
    Superman
    </Paragraph>
  <Paragraph>
    Superman
    </Paragraph>
  <Paragraph FontWeight="Bold">
    The Middle Years
    </Paragraph>
  <Paragraph>

  </Paragraph>
  <Paragraph>
    Superman
    </Paragraph>
  <Paragraph>
    Superman
    </Paragraph>
</FlowDocument>