diff --git a/400-SOURCECODE/AIAHTML5.Web/app/controllers/DAController.js b/400-SOURCECODE/AIAHTML5.Web/app/controllers/DAController.js
index 4286219..052ddf8 100644
--- a/400-SOURCECODE/AIAHTML5.Web/app/controllers/DAController.js
+++ b/400-SOURCECODE/AIAHTML5.Web/app/controllers/DAController.js
@@ -1465,7 +1465,7 @@ AIA.controller("DAController", ["$scope", "$rootScope", "$compile", "$http", "$l
                 $scope.isLayerChange = false;
             }
 
-            if (evt.ctrlKey || evt.metaKey) {
+            if (evt.ctrlKey) {
                 $rootScope.multiAnnotationIsON = true;
 
                 //document.getElementById("btnZoom").setAttribute('disabled', 'disabled');
@@ -1881,7 +1881,7 @@ AIA.controller("DAController", ["$scope", "$rootScope", "$compile", "$http", "$l
                 $scope.isLayerChange = false;
             }
 
-            if (evt.ctrlKey || evt.metaKey) {
+            if (evt.ctrlKey) {
                 $rootScope.multiAnnotationIsON = true;
 
                 //$("#btnZoom").addClass('disabled');
@@ -3616,7 +3616,7 @@ AIA.controller("DAController", ["$scope", "$rootScope", "$compile", "$http", "$l
             // we decide the size of speech bubble
             //2.
          
-            if (event.ctrlKey || event.metaKey) {
+            if (event.ctrlKey) {
                 console.log('ctrl pressed');
                 $scope.multiAnnotationIsON = true;
                 //2.1 create unique speech bubbles
@@ -3685,7 +3685,7 @@ AIA.controller("DAController", ["$scope", "$rootScope", "$compile", "$http", "$l
         else {
             $scope.longest_annotationT1 = $scope.annotationTextArrayT1.reduce(function (a, b) { return a.length > b.length ? a : b; });
             $scope.longest_annotationT2 = $scope.annotationTextArrayT2.reduce(function (a, b) { return a.length > b.length ? a : b; });
-            if (event.ctrlKey || event.metaKey) {
+            if (event.ctrlKey) {
                 $scope.j = $scope.j + 1;
                 var sub_id_annotation = "black_annotation" + $scope.j;
                 var pointClicked_annotation = parseInt(x) + parseInt(y);