netbox-community-netbox/netbox/templates/control_buttons.html

<div class="container mb-2 mx-0">
  <div class="d-flex flex-wrap justify-content-end">
    <div class="d-flex flex-shrink-1 me-2">
      <button type="button" class="btn btn-sm btn-success">
        <i class="bi bi-plus-circle"></i>
        &nbsp;Add
      </button>
    </div>
    <div class="d-flex flex-shrink-1">
      <div class="btn-toolbar">
        <div class="btn-group me-2">
          <button type="button" class="btn btn-sm btn-outline-secondary">
            <i class="bi bi-upload"></i>&nbsp;Import
          </button>
          <button type="button" class="btn btn-sm btn-outline-secondary">
            <i class="bi bi-download"></i>&nbsp;Export
          </button>
        </div>
      </div>
    </div>
    <div class="d-flex flex-shrink-1">
      <button
        type="button"
        class="btn btn-sm btn-outline-secondary dropdown-toggle"
      >
        <i class="bi bi-sliders"></i>
      </button>
    </div>
  </div>
</div>