<xal xmlns="http://openxal.org/ui/java">
  <borderPane height="400px" width="400px" horizontalGap="12px" verticalGap="11px" padding="20px">
    <horizontalFlowPane caption="horizontalFlowPane: Alignment = start" height="400px" width="400px" borderPosition="center" padding="20px">
      <button height="25px" width="100px" text="Button 1"/>
      <button height="25px" width="100px" text="Button 2"/>
      <button height="25px" width="100px" text="Button 3"/>
      <button height="25px" text="Button 4" width="100px"/>
      <button height="25px" text="Button 5" width="100px"/>
      <button height="25px" text="Button 6" width="100px"/>
      <button height="25px" text="Button 7" width="100px"/>
      <button height="25px" text="Button 8" width="100px"/>
    </horizontalFlowPane>
  </borderPane>
</xal>