LanMountainDesktop/LanMountainDesktop/Views/ComponentEditors/WhiteboardComponentEditor.axaml

<UserControl xmlns="https://github.com/avaloniaui"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             mc:Ignorable="d"
             x:Class="LanMountainDesktop.Views.ComponentEditors.WhiteboardComponentEditor">
    <StackPanel Spacing="16">
        <Border Classes="component-editor-hero-card"
                Padding="24">
            <StackPanel Spacing="8">
                <TextBlock x:Name="HeadlineTextBlock"
                           Classes="component-editor-headline"
                           TextWrapping="Wrap" />
                <TextBlock x:Name="DescriptionTextBlock"
                           Classes="component-editor-secondary-text"
                           TextWrapping="Wrap" />
            </StackPanel>
        </Border>

        <Border Classes="component-editor-card"
                Padding="20">
            <StackPanel Spacing="12">
                <TextBlock x:Name="RetentionHeaderTextBlock"
                           Classes="component-editor-section-title" />
                <TextBlock x:Name="RetentionDescriptionTextBlock"
                           Classes="component-editor-secondary-text"
                           TextWrapping="Wrap" />
                <ComboBox x:Name="RetentionComboBox"
                          Classes="component-editor-select"
                          HorizontalAlignment="Stretch"
                          SelectionChanged="OnRetentionSelectionChanged" />
            </StackPanel>
        </Border>

        <TextBlock x:Name="InstanceHintTextBlock"
                   Classes="component-editor-secondary-text"
                   Margin="12,0"
                   TextWrapping="Wrap" />
    </StackPanel>
</UserControl>