Added comment for clarification

Author: FlyingBird95

dashboard/templates/endpoint/endpoint_with_selection.html

@@ -1,5 +1,6 @@
 {% extends "endpoint/endpoint_base.html" %}
 {% block graph_content %}
+    <p>Select a number of items below to reduce the size of the graph.</p>
     <br />
     <form action="#" method="post">
         {{ form.selection(style="width: 200px; height: 300px;") }}