Index: lams_central/web/addLesson.jsp
===================================================================
diff -u -ra7b73d2f6a24a76b73a9b38c19cae6199e8dbf9f -r5ccaa5d3f475e93053eb657ace948a855f865a90
--- lams_central/web/addLesson.jsp	(.../addLesson.jsp)	(revision a7b73d2f6a24a76b73a9b38c19cae6199e8dbf9f)
+++ lams_central/web/addLesson.jsp	(.../addLesson.jsp)	(revision 5ccaa5d3f475e93053eb657ace948a855f865a90)
@@ -42,8 +42,10 @@
 			LABEL_MISSING_LEARNERS = '<fmt:message key="error.tab.class.learners" />',
 			LABEL_MISSING_MONITORS = '<fmt:message key="error.tab.class.monitors" />',
 			LABEL_RUN_SEQUENCES_FOLDER = '<fmt:message key="label.tab.lesson.sequence.folder" />',
-			LABEL_NAME_INVALID_CHARACTERS = '<fmt:message key="error.lessonname.invalid.characters" />';
-				
+			LABEL_NAME_INVALID_CHARACTERS = '<fmt:message key="error.lessonname.invalid.characters" />',
+			LABEL_PREVIEW_LESSON_DEFAULT_TITLE = '<fmt:message key="authoring.fla.preview.lesson.default.title" />',
+			LABEL_PREVIEW_ERROR = '<fmt:message key="authoring.fla.preview.error" />';
+			
  		$(document).ready(function(){
 			initLessonTab();
 			initClassTab();
@@ -291,6 +293,9 @@
 
 <hr class="separator" />
 <div class="container-fluid">
+	<button id="previewButton" class="btn btn-default" href="#" onClick="javascript:previewLesson()"><i class="fa fa-search-plus"></i>
+		<fmt:message key="authoring.fla.page.menu.preview" />
+	</button>
 	<div class="pull-right">
 		<button id="addButton" class="btn btn-primary" href="#" onClick="javascript:addLesson()"><i class="fa fa-plus"></i> 
 			<fmt:message key="button.add.now" />
Index: lams_central/web/includes/javascript/addLesson.js
===================================================================
diff -u -r2d50303390a6ea1ec157a3a1390ecf3833c0339c -r5ccaa5d3f475e93053eb657ace948a855f865a90
--- lams_central/web/includes/javascript/addLesson.js	(.../addLesson.js)	(revision 2d50303390a6ea1ec157a3a1390ecf3833c0339c)
+++ lams_central/web/includes/javascript/addLesson.js	(.../addLesson.js)	(revision 5ccaa5d3f475e93053eb657ace948a855f865a90)
@@ -314,6 +314,52 @@
 	}});
 }
 
+function previewLesson(){
+	var ldNode = tree.getHighlightedNode();
+	if (!ldNode || !ldNode.data.learningDesignId) {
+		$('#ldNotChosenError').show();
+		doSelectTab(1);
+		return;
+	}
+	$('body').css('cursor', 'wait');
+	// initialize, create and enter the preview lesson
+	$.ajax({
+		url : LAMS_URL + 'monitoring/monitoring.do',
+		data : {
+			'method' : 'initializeLesson',
+			'learningDesignID' : ldNode.data.learningDesignId,
+			'copyType' : 3,
+			'lessonName' : LABEL_PREVIEW_LESSON_DEFAULT_TITLE
+		},
+		cache : false,
+		dataType : 'text',
+		success : function(lessonID) {
+			if (!lessonID) {
+				alert(LABELS.PREVIEW_ERROR);
+				$('body').css('cursor', 'auto');
+				return;
+			}
+			
+			$.ajax({
+				url : LAMS_URL + 'monitoring/monitoring.do',
+				data : {
+					'method' : 'startPreviewLesson',
+					'lessonID' : lessonID
+				},
+				cache : false,
+				dataType : 'text',
+				success : function() {
+					$('body').css('cursor', 'auto');
+					// open preview pop up window
+					window.open(LAMS_URL + 'home.do?method=learner&mode=preview&lessonID='+lessonID,'Preview',
+								'width=1280,height=720,resizable,status=yes');
+				}
+			});
+
+		}
+	});
+}
+
 // ********** LESSON TAB FUNCTIONS **********
 
 function loadLearningDesignSVG(ldId) {
Index: lams_central/web/includes/javascript/main.js
===================================================================
diff -u -r4ce511c4d6fb96b1ad07ef0853168c28cc23ebc7 -r5ccaa5d3f475e93053eb657ace948a855f865a90
--- lams_central/web/includes/javascript/main.js	(.../main.js)	(revision 4ce511c4d6fb96b1ad07ef0853168c28cc23ebc7)
+++ lams_central/web/includes/javascript/main.js	(.../main.js)	(revision 5ccaa5d3f475e93053eb657ace948a855f865a90)
@@ -310,7 +310,7 @@
 		'data' : {
 			'orgID' : orgID
 		},
-		'height': Math.max(380, Math.min(740, $(window).height() - 30)),
+		'height': Math.max(380, Math.min(700, $(window).height() - 30)),
 		'width' : Math.max(380, Math.min(850, $(window).width() - 60)),
 		'title' : LABELS.ADD_LESSON_TITLE,
 		'open' : function() {