inabox/inabox.wpf/DynamicGrid/PDF/RichTextEditorControl.xaml

<UserControl x:Class="InABox.DynamicGrid.RTFEditorControl"
             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"
             xmlns:local="clr-namespace:InABox.DynamicGrid"
             xmlns:syncfusion="http://schemas.syncfusion.com/wpf"
             mc:Ignorable="d"
             d:DesignHeight="300" d:DesignWidth="300">
    <syncfusion:SfRichTextBoxAdv x:Name="Editor" Background="DimGray"/>
</UserControl>