<table>
<tr>
-<th>steps</th>
-<th>title</th>
+<th><a href="?sort_by={% if sort_by == "steps" %}-{% endif %}steps">steps</a></th>
+<th><a href="?sort_by={% if sort_by == "title" %}-{% endif %}title">title</a></th>
</tr>
{% for process in processes %}
<tr>