Index: lams_central/src/flash/org/lamsfoundation/lams/authoring/tb/ToolbarController.as
===================================================================
diff -u -rb3be294808667a4c67858b7ac07e0f2bb19f0baf -r4bd39cff0646511d2734d54ddd5db0f17c48a91a
--- lams_central/src/flash/org/lamsfoundation/lams/authoring/tb/ToolbarController.as	(.../ToolbarController.as)	(revision b3be294808667a4c67858b7ac07e0f2bb19f0baf)
+++ lams_central/src/flash/org/lamsfoundation/lams/authoring/tb/ToolbarController.as	(.../ToolbarController.as)	(revision 4bd39cff0646511d2734d54ddd5db0f17c48a91a)
@@ -45,13 +45,13 @@
 		}else if(tgt.indexOf("trans") != -1){
 			_app.getCanvas().toggleTransitionTool();
 		}else if(tgt.indexOf("optional") != -1){
-			
+			_app.getCanvas().startOptionalActivity();
 		}else if(tgt.indexOf("gate") != -1){
 			_app.getCanvas().toggleGateTool();
 		}else if(tgt.indexOf("group") != -1){
 			_app.getCanvas().toggleGroupTool();
 		}else if(tgt.indexOf("preview") != -1){
-			
+			_app.getCanvas().launchPreviewWindow();
 		}
 	}