Index: lams_central/web/authoring/authoring.jsp
===================================================================
diff -u -rdf52da4d6548fc0576e8e8c8ffbb1fc11e202fa0 -r7f5de60cba2fa6ed056786c5461af6e29518723f
--- lams_central/web/authoring/authoring.jsp	(.../authoring.jsp)	(revision df52da4d6548fc0576e8e8c8ffbb1fc11e202fa0)
+++ lams_central/web/authoring/authoring.jsp	(.../authoring.jsp)	(revision 7f5de60cba2fa6ed056786c5461af6e29518723f)
@@ -375,7 +375,8 @@
 			<span><fmt:message key="authoring.fla.page.menu.arrange" /></span>
 		</button>
 				
-		<button id="previewButton" class="btn btn-default" onClick="javascript:MenuLib.openPreview()">
+		<button id="previewButton" class="btn btn-default" onClick="javascript:MenuLib.openPreview()"
+				data-loading-text="<i class='fa fa-circle-o-notch fa-spin'></i><span> <fmt:message key="authoring.fla.page.menu.preview" /></span>">
 			<i class="fa fa-search-plus"></i> 
 			<span><fmt:message key="authoring.fla.page.menu.preview" /></span>
 		</button>