Add a reminder to people that subject codes are usually four letters long

application/modules/courses/views/scripts/new/search.phtml

@@ -12,7 +12,7 @@
     <div class="content">
         <form id="search_form" action="<?php echo $this->baseUrl(); ?>/courses/new/search.post" method="post">
             <fieldset>
-                <label>Subject Area</label>
+                <label>Subject Area (Usually four letters)</label>
                 <input type="text" id="subject" name="subject" />
             </fieldset>
             <fieldset>