netbox-community-netbox/netbox/templates/ipam/prefix_list.html

{% extends 'utilities/obj_list.html' %}
{% load helpers %}

{% block buttons %}
    <div class="btn-group" role="group">
        <a href="{% url 'ipam:prefix_list' %}{% querystring request expand=None page=1 %}" class="btn btn-default{% if not request.GET.expand %} active{% endif %}">Collapse</a>
        <a href="{% url 'ipam:prefix_list' %}{% querystring request expand='on' page=1 %}" class="btn btn-default{% if request.GET.expand %} active{% endif %}">Expand</a>
    </div>
{% endblock %}