source/_templates/terms.html

<p class="terms">
  <a class="reference internal terms-of-service" href="{{ pathto('_static/docs/lets-plot_terms.pdf', 1) }}" target="_blank">
    Terms
  </a>
  |
  <a class="reference internal licenses" href="{{ pathto('python/pages/licenses') }}">
    Licenses
  </a>
</p>