To launch `xterm` or `uxterm` from the Openbox menu:
- Edit `~/.config/openbox/menu.xml` and add:

  ```xml
  <item label="XTerm">
    <action name="Execute">
      <command>xterm</command>
    </action>
  </item>
  ```
- For `uxterm`:
  ```xml
  <item label="UXTerm">
    <action name="Execute">
      <command>uxterm</command>
    </action>
  </item>
  ```

After reload openbox configuration: openbox --reconfigure

<?xml version="1.0" encoding="UTF-8"?>
<openbox_menu xmlns="http://openbox.org/" xmlns:xi="http://www.w3.org/2001/XInclude">
  <menu id="root-menu" label="Openbox">
    <!-- Applications Menu -->
    <menu id="applications" label="Applications">
      <!-- Terminal (xterm) -->
      <item label="Terminal (xterm)">
        <action name="Execute">
          <command>xterm -fs 14</command>
        </action>
      </item>
 
      <!-- Terminal (uxterm) -->
      <item label="Terminal (uxterm)">
        <action name="Execute">
          <command>uxterm -fn "xft:DejaVu Sans Mono:size=14"</command>
        </action>
      </item>
 
      <!-- File Manager (pcmanfm) -->
      <item label="File Manager">
        <action name="Execute">
          <command>pcmanfm</command>
        </action>
      </item>
 
      <!-- Web Browser (firefox) -->
      <item label="Web Browser">
        <action name="Execute">
          <command>firefox</command>
        </action>
      </item>
    </menu>
 
    <!-- Exit Menu -->
    <menu id="exit" label="Exit">
      <item label="Logout">
        <action name="Execute">
          <command>openbox --exit</command>
        </action>
      </item>
      <item label="Reboot">
        <action name="Execute">
          <command>sudo reboot</command>
        </action>
      </item>
      <item label="Shutdown">
        <action name="Execute">
          <command>sudo poweroff</command>
        </action>
      </item>
    </menu>
  </menu>
</openbox_menu>