Index: lams_central/web/includes/javascript/addLesson.js
===================================================================
diff -u -r5ccaa5d3f475e93053eb657ace948a855f865a90 -rd1264becfcd788cf653fa077ef6ab90023a149fd
--- lams_central/web/includes/javascript/addLesson.js	(.../addLesson.js)	(revision 5ccaa5d3f475e93053eb657ace948a855f865a90)
+++ lams_central/web/includes/javascript/addLesson.js	(.../addLesson.js)	(revision d1264becfcd788cf653fa077ef6ab90023a149fd)
@@ -315,7 +315,10 @@
 }
 
 function previewLesson(){
-	var ldNode = tree.getHighlightedNode();
+	var ldNode = tree.getHighlightedNode(),
+	popupWidth = 1280,
+	popupHeight = 720;
+
 	if (!ldNode || !ldNode.data.learningDesignId) {
 		$('#ldNotChosenError').show();
 		doSelectTab(1);
@@ -352,7 +355,7 @@
 					$('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');
+								'width=' + popupWidth + ',height=' + popupHeight + ',resizable,status=yes');
 				}
 			});
 
@@ -632,4 +635,4 @@
 		var description = SPLIT_LEARNERS_DESCRIPTION.replace('[0]', instances).replace('[1]', learnerCount);
 		$('#splitLearnersDescription').html(description);
 	}
-}
\ No newline at end of file
+}