Avalonia/samples/ControlCatalog/Pages/PipsPager/PipsPagerCustomButtonThemesPage.xaml

<UserControl xmlns="https://github.com/avaloniaui"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             x:Class="ControlCatalog.Pages.PipsPagerCustomButtonThemesPage">
  <DockPanel>
    <ScrollViewer DockPanel.Dock="Right" Width="220">
      <StackPanel Margin="12" Spacing="8">
        <TextBlock Text="Custom Button Themes" FontSize="16" FontWeight="SemiBold"
                   Foreground="{DynamicResource SystemControlHighlightAccentBrush}" />
        <TextBlock TextWrapping="Wrap" FontSize="12" Opacity="0.7"
                   Text="Replace the default chevron navigation buttons with custom button themes using PreviousButtonTheme and NextButtonTheme." />
        <Separator />
        <TextBlock Text="Properties" FontSize="13" FontWeight="SemiBold" />
        <TextBlock FontSize="12" TextWrapping="Wrap" Text="PreviousButtonTheme" />
        <TextBlock FontSize="12" TextWrapping="Wrap" Text="NextButtonTheme" />
        <TextBlock FontSize="12" TextWrapping="Wrap" Text="IsPreviousButtonVisible" />
        <TextBlock FontSize="12" TextWrapping="Wrap" Text="IsNextButtonVisible" />
      </StackPanel>
    </ScrollViewer>

    <Border DockPanel.Dock="Right" Width="1"
            Background="{DynamicResource SystemControlForegroundBaseMediumLowBrush}" />

    <StackPanel Spacing="24" Margin="24">

      <StackPanel Spacing="8">
        <TextBlock Text="Text Buttons" FontWeight="SemiBold" FontSize="14" />
        <PipsPager NumberOfPages="5" MaxVisiblePips="5"
                   IsPreviousButtonVisible="True" IsNextButtonVisible="True">
          <PipsPager.Resources>
            <ControlTheme x:Key="CustomPreviousButtonTheme" TargetType="Button">
              <Setter Property="Content" Value="Prev" />
              <Setter Property="Background" Value="LightGray" />
              <Setter Property="Foreground" Value="Black" />
              <Setter Property="Padding" Value="8,2" />
              <Setter Property="Margin" Value="0,0,8,0" />
              <Setter Property="Template">
                <ControlTemplate>
                  <Border Background="{TemplateBinding Background}" CornerRadius="4">
                    <ContentPresenter Content="{TemplateBinding Content}" Margin="{TemplateBinding Padding}" />
                  </Border>
                </ControlTemplate>
              </Setter>
            </ControlTheme>
            <ControlTheme x:Key="CustomNextButtonTheme" TargetType="Button">
              <Setter Property="Content" Value="Next" />
              <Setter Property="Background" Value="LightGray" />
              <Setter Property="Foreground" Value="Black" />
              <Setter Property="Padding" Value="8,2" />
              <Setter Property="Margin" Value="8,0,0,0" />
              <Setter Property="Template">
                <ControlTemplate>
                  <Border Background="{TemplateBinding Background}" CornerRadius="4">
                    <ContentPresenter Content="{TemplateBinding Content}" Margin="{TemplateBinding Padding}" />
                  </Border>
                </ControlTemplate>
              </Setter>
            </ControlTheme>
          </PipsPager.Resources>
          <PipsPager.PreviousButtonTheme>
            <StaticResource ResourceKey="CustomPreviousButtonTheme" />
          </PipsPager.PreviousButtonTheme>
          <PipsPager.NextButtonTheme>
            <StaticResource ResourceKey="CustomNextButtonTheme" />
          </PipsPager.NextButtonTheme>
        </PipsPager>
      </StackPanel>

      <StackPanel Spacing="8">
        <TextBlock Text="Hidden Buttons" FontWeight="SemiBold" FontSize="14" />
        <PipsPager NumberOfPages="7"
                   MaxVisiblePips="7"
                   IsPreviousButtonVisible="False"
                   IsNextButtonVisible="False" />
      </StackPanel>

    </StackPanel>
  </DockPanel>
</UserControl>