eens.
      </p>
      <p>
        WCO enables the creation of custom title bar UI by leaving only the
        [=window controls=] [=overlaid=] on the frame, in which case web
        content can flow into the area previously held by the title bar.
      </p><img src="spec-wco.png" alt=
      "Blank window frame showing the controls area.">
      <section>
        <h3>
          Examples
        </h3>
        <aside class="example">
          <p>
            Positioning a div on the title bar area
         