scikit-image/doc/source/_templates/navigation.html

<h4 class="sidebar-box-heading">{{ _('Navigation') }}</h4>
<div class="well sidebar-box">
    <ul class="nav nav-list">
        <li><a href="{{ pathto(master_doc) }}">Documentation Home</a></li>
    </ul>
</div>
{%- if prev %}
    <h4 class="sidebar-box-heading">{{ _('Previous topic') }}</h4>
    <div class="well sidebar-box">
        <ul class="nav nav-list">
            <li><a href="{{ prev.link|e }}" title="{{ _('previous chapter') }}">{{ prev.title }}</a></li>
        </ul>
    </div>
{%- endif %}
{%- if next %}
    <h4 class="sidebar-box-heading">{{ _('Next topic') }}</h4>
    <div class="well sidebar-box">
        <ul class="nav nav-list">
            <li><a href="{{ next.link|e }}" title="{{ _('next chapter') }}">{{ next.title }}</a></li>
        </ul>
    </div>
{%- endif %}