</a></li><li><a href="../../../cn/usage/controller/sound.html">声音</a></li></ul></ul><i class="bi bi-list mobile-sub-nav-toggle"></i></nav></div><div class="col-md-12 col-lg-9"><div><h3>钢笔工具</h3><p><iframe loading="lazy" width="560" height="315" src="https://www.youtube.com/embed/tcCOohy956c" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe></p><p>你可以自由地画线，并使