diff --git a/src/editor/controller/initRender.js b/src/editor/controller/initRender.js
index 00e8630..1de110c 100644
--- a/src/editor/controller/initRender.js
+++ b/src/editor/controller/initRender.js
@@ -195,14 +195,35 @@ define(
                     return;
                 }
 
+                // 放大
+                if (e.keyCode == 187 && e.ctrlKey) {
+                    e.originEvent.stopPropagation();
+                    e.originEvent.preventDefault();
+                    var size = render.getSize();
+                    render.scale(1.25, {
+                        x: size.width / 2, 
+                        y: size.height / 2
+                    });
+                }
+                // 缩小
+                else if (e.keyCode == 189 && e.ctrlKey) {
+                    e.originEvent.stopPropagation();
+                    e.originEvent.preventDefault();
+                    var size = render.getSize();
+                    render.scale(0.8, {
+                        x: size.width / 2, 
+                        y: size.height / 2
+                    });
+                }
                 // 撤销
-                if (e.keyCode == 90 && e.ctrlKey) {
+                else if (e.keyCode == 90 && e.ctrlKey) {
                     me.execCommand('undo');
                 }
                 // 恢复
                 else if (e.keyCode == 89 && e.ctrlKey) {
                     me.execCommand('redo');
                 }
+
                 else {
                     me.mode.keydown && me.mode.keydown.call(me, e);
                 }
diff --git a/src/editor/group/ShapesGroup.js b/src/editor/group/ShapesGroup.js
index 764a8a9..3b2f054 100644
--- a/src/editor/group/ShapesGroup.js
+++ b/src/editor/group/ShapesGroup.js
@@ -88,6 +88,7 @@ define(
 
 
             this.editor.coverLayer.removeShape('bound');
+            this.editor.coverLayer.removeShape('boundcenter');
             delete this.bound;
 
             this.refresh();
diff --git a/src/editor/mode/bound.js b/src/editor/mode/bound.js
index 13d8195..c906d82 100644
--- a/src/editor/mode/bound.js
+++ b/src/editor/mode/bound.js
@@ -33,7 +33,8 @@ define(
                         if (result.length > 1) {
                             shape = selectShape(result);
                         }
-                        this.setMode('shapes', [shape]);
+
+                        this.setMode('shapes', [shape], 'bound');
                         return;
                     }
 
diff --git a/src/editor/mode/range.js b/src/editor/mode/range.js
index 834097a..ba687aa 100644
--- a/src/editor/mode/range.js
+++ b/src/editor/mode/range.js
@@ -74,7 +74,7 @@ define(
                         if (bound.width >= 20 && bound.height >= 20) {
                             var shapes;
                             if ((shapes = selectShapes.call(this, bound))) {
-                                this.setMode('shapes', shapes);
+                                this.setMode('shapes', shapes, 'range');
                                 return;
                             }
                         }
diff --git a/src/editor/mode/shapes.js b/src/editor/mode/shapes.js
index a14eecf..462fb8a 100644
--- a/src/editor/mode/shapes.js
+++ b/src/editor/mode/shapes.js
@@ -289,11 +289,16 @@ define(
             /**
              * 开始模式
              */
-            begin: function(shapes) {
+            begin: function(shapes, prevMode) {
                 this.currentGroup = new ShapesGroup(shapes, this);
                 this.currentGroup.refresh();
                 this.currentGroup.setMode('scale');
-                this.clicked = false;
+                if (prevMode == 'bound') {
+                    this.clicked = false;
+                }
+                else {
+                    this.clicked = true;
+                }
             },
 
 
diff --git a/src/render/Render.js b/src/render/Render.js
index cce10c4..8d5c84b 100644
--- a/src/render/Render.js
+++ b/src/render/Render.js
@@ -47,7 +47,9 @@ define(
             if(this.options.enableScale) {
                 var me = this;
                 this.capture.on('wheel', function(e) {
-                    if (e.altKey) {
+                    if (e.ctrlKey) {
+                        e.originEvent.stopPropagation();
+                        e.originEvent.preventDefault();
                         var defaultRatio = me.options.defaultRatio || 1.2;
                         var ratio = e.delta > 0 ?  defaultRatio : 1 / defaultRatio;
                         var toScale = me.camera.scale * ratio;
@@ -154,10 +156,19 @@ define(
          * @return {this}
          */
         Render.prototype.scale = function(ratio, p, noRefresh) {
+
+            var toScale = this.camera.scale * ratio;
+            if (
+                toScale < this.options.minScale 
+                || toScale > this.options.maxScale
+            ) {
+                return;
+            }
+
             this.camera.ratio = ratio;
             this.camera.center.x = p.x;
             this.camera.center.y = p.y;
-            this.camera.scale *= ratio;
+            this.camera.scale = toScale;
 
             if(true !== noRefresh) {
                 this.painter.refresh();
diff --git a/src/render/capture/Keyboard.js b/src/render/capture/Keyboard.js
index c569519..31d3ac7 100644
--- a/src/render/capture/Keyboard.js
+++ b/src/render/capture/Keyboard.js
@@ -47,7 +47,8 @@ define(
                 ctrlKey: e.ctrlKey,
                 metaKey: e.metaKey,
                 altKey: e.altKey,
-                shiftKey: e.shiftKey
+                shiftKey: e.shiftKey,
+                originEvent: e
             };
         }