如何在Bootstrap 4中定位轮播指示器

<div id="myCarousel" class="carousel slide" data-ride="carousel">
  <!-- 轮播指示器 -->
  <ol class="carousel-indicators">
    <li data-target="#myCarousel" data-slide-to="0" class="active"></li>
    <li data-target="#myCarousel" data-slide-to="1"></li>
    <li data-target="#myCarousel" data-slide-to="2"></li>
  </ol>

  <!-- 轮播项目 -->
  <div class="carousel-inner">
    <div class="carousel-item active">
      <img src="img1.jpg" alt="Image 1">
    </div>
    <div class="carousel-item">
      <img src="img2.jpg" alt="Image 2">
    </div>
    <div class="carousel-item">
      <img src="img3.jpg" alt="Image 3">
    </div>
  </div>

  <!-- 左右控制按钮 -->
  <a class="carousel-control-prev" href="#myCarousel" role="button" data-slide="prev">
    <span class="carousel-control-prev-icon" aria-hidden="true"></span>
    <span class="sr-only">Previous</span>
  </a>
  <a class="carousel-control-next" href="#myCarousel" role="button" data-slide="next">
    <span class="carousel-control-next-icon" aria-hidden="true"></span>
    <span class="sr-only">Next</span>
  </a>
</div>