docs/python_docs/themes/mx-theme/mxtheme/relations.html

<div class="pagenation">
  {%- if prev %}
     <a id="button-prev" href="{{ prev.link|e }}" class="mdl-button mdl-js-button mdl-js-ripple-effect mdl-button--colored" role="botton" {{ accesskey("P") }}>
         <i class="pagenation-arrow-L fas fa-arrow-left fa-lg"></i>
         <div class="pagenation-text">
            <span class="pagenation-direction">Previous</span>
            <div>{{ prev.title|striptags }}</div>
         </div>
     </a>
  {%- endif %}
  {%- if next %}
     <a id="button-next" href="{{ next.link|e }}" class="mdl-button mdl-js-button mdl-js-ripple-effect mdl-button--colored" role="botton" {{ accesskey("N") }}>
         <i class="pagenation-arrow-R fas fa-arrow-right fa-lg"></i>
        <div class="pagenation-text">
            <span class="pagenation-direction">Next</span>
            <div>{{ next.title|striptags }}</div>
        </div>
     </a>
  {%- endif %}
  </div>