navigation.html

<div class="navigation-scrollbox">
    <div class="nav-toctree">
    {{ toctree(includehidden=theme_sidebar_includehidden, collapse=theme_sidebar_collapse) }}
    </div>
    {% if theme_extra_nav_links %}
    <ul class="extra-nav-links">
        {% for link in theme_extra_nav_links %}
        <li class="toctree-l1">
            <a href="{{ pathto(link.uri, 1) if link.relative else link.uri }}">
                {{ link.title }}
            </a>
        </li>
        {% endfor %}
    </ul>
    {% endif %}
</div>