Centering Modals & Fullscreen Modals

<!-- Centered Modal -->
<button type="button" class="btn btn-warning" data-bs-toggle="modal" data-bs-target="#centerModal">Centered Modal</button>

<div class="modal fade" id="centerModal">
  <div class="modal-dialog modal-dialog-centered">
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title">Centered Modal</h5>
        <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
      </div>
      <div class="modal-body">
        This modal is centered vertically.
      </div>
    </div>
  </div>
</div>

<!-- Fullscreen Modal -->
<button type="button" class="btn btn-dark" data-bs-toggle="modal" data-bs-target="#fullscreenModal">Fullscreen Modal</button>

<div class="modal fade" id="fullscreenModal">
  <div class="modal-dialog modal-fullscreen">
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title">Fullscreen Modal</h5>
        <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
      </div>
      <div class="modal-body">
        This modal takes up the entire screen.
      </div>
    </div>
  </div>
</div>