diff --git a/colloscope/templates/table.html b/colloscope/templates/table.html
index 024a023..40c45fa 100644
--- a/colloscope/templates/table.html
+++ b/colloscope/templates/table.html
@@ -22,7 +22,25 @@
 
     <h2>Colloscope : {{ periode.libelle }}</h2>
 
-    <a href="export.pdf" target="_blank">Exporter le colloscope</a>
+    <form method="get" action="{% url "colloscope.table" %}">
+    Changer de période&nbsp;:
+        <select name="periode" id="periode">
+            {% for p in periode.classe.periode_set.all %}
+            {% if p.id == periode.id %}
+            <option value="{{ p.id }}" selected>{{ p }}</option>
+            {% else %}
+            <option value="{{ p.id }}" selected>{{ p }}</option>
+            {% endif %}
+            {% endfor %}
+        </select>
+        <button type="submit">Valider</button>
+    </form>
+
+    {% if request.GET.periode %}
+        <a href="export.pdf?periode={{ request.GET.periode }}" target="_blank">Exporter le colloscope</a>
+    {% else %}
+        <a href="export.pdf" target="_blank">Exporter le colloscope</a>
+    {% endif %}
 
     <div class="table-wrapper">
     <table>
diff --git a/colloscope/templates/trunk.html b/colloscope/templates/trunk.html
deleted file mode 100644
index 78f0b9c..0000000
--- a/colloscope/templates/trunk.html
+++ /dev/null
@@ -1,4 +0,0 @@
-{% extends "base.html" %}
-
-{% block header %}
-{% endblock header %}