labwc/docs/menu.xml

<?xml version="1.0" encoding="UTF-8"?>

<openbox_menu>
<menu id="client-menu" label="ClientMenu">
	<item label="Minimize">
		<action name="Iconify" />
	</item>
	<item label="Maximize">
		<action name="ToggleMaximize" />
	</item>
	<item label="Fullscreen">
		<action name="ToggleFullscreen" />
	</item>
	<item label="Decorations">
		<action name="ToggleDecorations" />
	</item>
	<item label="Close">
		<action name="Close" />
	</item>
</menu>
<menu id="root-menu" label="">
  <item label="Web browser">
    <action name="Execute"><command>firefox</command></action>
  </item>
  <item label="Terminal">
    <action name="Execute"><command>alacritty</command></action>
  </item>
  <item label="Reconfigure">
    <action name="Reconfigure"></action>
  </item>
  <item label="Exit">
    <action name="Exit"></action>
  </item>
  <item label="Poweroff">
    <action name="Execute"><command>systemctl -i poweroff</command></action>
  </item>
</menu>

</openbox_menu>