blog/_includes/page_navigation.html

<div>
    <ul>
{% if page.is_home != true %}
    <li>
    <a class="home" href="{{ site.baseurl }}/" title="Back to Homepage">Home</a>
    </li>
{% endif %}
    <li>
        <a href="#top-page" title="Back to top ">Top</a>
    </li>
    </ul>
</div>