diff --git a/PPOCRLabel/PPOCRLabel.py b/PPOCRLabel/PPOCRLabel.py
index 2287ba7d4cd62ac2c618b139e9ffb8c42196060e..450345fece5b7e2c093ef33c72dee7726816e8c1 100644
--- a/PPOCRLabel/PPOCRLabel.py
+++ b/PPOCRLabel/PPOCRLabel.py
@@ -431,8 +431,7 @@ class MainWindow(QMainWindow):
         #  ================== New Actions ==================
 
         edit = action(getStr('editLabel'), self.editLabel,
-                      'Ctrl+E', 'edit', getStr('editLabelDetail'),
-                      enabled=False)
+                      'Ctrl+E', 'edit', getStr('editLabelDetail'), enabled=False)
 
         AutoRec = action(getStr('autoRecognition'), self.autoRecognition,
                          '', 'Auto', getStr('autoRecognition'), enabled=False)
@@ -465,11 +464,10 @@ class MainWindow(QMainWindow):
                       'Ctrl+Z', "undo", getStr("undo"), enabled=False)
 
         change_cls = action(getStr("keyChange"), self.change_box_key,
-                            'Ctrl+B', "edit", getStr("keyChange"), enabled=False)
+                            'Ctrl+X', "edit", getStr("keyChange"), enabled=False)
 
         lock = action(getStr("lockBox"), self.lockSelectedShape,
-                      None, "lock", getStr("lockBoxDetail"),
-                      enabled=False)
+                      None, "lock", getStr("lockBoxDetail"), enabled=False)
 
         self.editButton.setDefaultAction(edit)
         self.newButton.setDefaultAction(create)
@@ -534,7 +532,8 @@ class MainWindow(QMainWindow):
                               fileMenuActions=(opendir, open_dataset_dir, saveLabel, resetAll, quit),
                               beginner=(), advanced=(),
                               editMenu=(createpoly, edit, copy, delete, singleRere, None, undo, undoLastPoint,
-                                        None, rotateLeft, rotateRight, None, color1, self.drawSquaresOption, lock),
+                                        None, rotateLeft, rotateRight, None, color1, self.drawSquaresOption, lock,
+                                        None, change_cls),
                               beginnerContext=(
                                   create, edit, copy, delete, singleRere, rotateLeft, rotateRight, lock, change_cls),
                               advancedContext=(createMode, editMode, edit, copy,
@@ -2206,6 +2205,8 @@ class MainWindow(QMainWindow):
             print('The program will automatically save once after confirming 5 images (default)')
 
     def change_box_key(self):
+        if not self.kie_mode:
+            return
         key_text, _ = self.keyDialog.popUp(self.key_previous_text)
         if key_text is None:
             return
@@ -2219,6 +2220,7 @@ class MainWindow(QMainWindow):
                 self.keyList.setItemLabel(item, key_text, rgb)
 
             self._update_shape_color(shape)
+            self.keyDialog.addLabelHistory(key_text)
 
     def undoShapeEdit(self):
         self.canvas.restoreShape()
diff --git a/PPOCRLabel/README.md b/PPOCRLabel/README.md
index 4d25e670ae6d07d569a247bc5f9c35c939b23f8e..4cb32234d0363a6c7631220bb703bf657f16d250 100644
--- a/PPOCRLabel/README.md
+++ b/PPOCRLabel/README.md
@@ -156,6 +156,7 @@ python PPOCRLabel.py --kie True # [KIE mode] for [detection + recognition + keyw
 | X                        | Rotate the box anti-clockwise                    |
 | C                        | Rotate the box clockwise                         |
 | Ctrl + E                 | Edit label of the selected box                   |
+| Ctrl + X                 | Change key class of the box when enable `--kie`  |
 | Ctrl + R                 | Re-recognize the selected box                    |
 | Ctrl + C                 | Copy and paste the selected box                  |
 | Ctrl + Left Mouse Button | Multi select the label box                       |
diff --git a/PPOCRLabel/README_ch.md b/PPOCRLabel/README_ch.md
index 3f8dc4f0c6b7cc88a71409d123f598e74b3f2cad..1417892e4ee7eeba069d9924c493ebfea656d026 100644
--- a/PPOCRLabel/README_ch.md
+++ b/PPOCRLabel/README_ch.md
@@ -137,25 +137,26 @@ python PPOCRLabel.py --lang ch --kie True  # 启动 【KIE 模式】，用于打
 
 ### 3.1 快捷键
 
-| 快捷键              | 说明             |
-|------------------|----------------|
-| Ctrl + shift + R | 对当前图片的所有标记重新识别  |
-| W                | 新建矩形框                  |
-| Q                | 新建四点框                  |
-| X                | 框逆时针旋转                |
-| C                | 框顺时针旋转                |
-| Ctrl + E         | 编辑所选框标签              |
-| Ctrl + R         | 重新识别所选标记            |
-| Ctrl + C         | 复制并粘贴选中的标记框       |
-| Ctrl + 鼠标左键    | 多选标记框                 |
-| Alt + X          | 删除所选框                 |
-| Ctrl + V         | 确认本张图片标记           |
-| Ctrl + Shift + d | 删除本张图片               |
-| D                | 下一张图片                |
-| A                | 上一张图片                |
-| Ctrl++           | 缩小                     |
-| Ctrl--           | 放大                     |
-| ↑→↓←             | 移动标记框                |
+| 快捷键              | 说明                              |
+|------------------|---------------------------------|
+| Ctrl + shift + R | 对当前图片的所有标记重新识别                  |
+| W                | 新建矩形框                           |
+| Q                | 新建四点框                           |
+| X                | 框逆时针旋转                          |
+| C                | 框顺时针旋转                          |
+| Ctrl + E         | 编辑所选框标签                         |
+| Ctrl + X         |  `--kie` 模式下，修改 Box 的关键字种类 |
+| Ctrl + R         | 重新识别所选标记                        |
+| Ctrl + C         | 复制并粘贴选中的标记框                     |
+| Ctrl + 鼠标左键    | 多选标记框                           |
+| Alt + X          | 删除所选框                           |
+| Ctrl + V         | 确认本张图片标记                        |
+| Ctrl + Shift + d | 删除本张图片                          |
+| D                | 下一张图片                           |
+| A                | 上一张图片                           |
+| Ctrl++           | 缩小                              |
+| Ctrl--           | 放大                              |
+| ↑→↓←             | 移动标记框                           |
 
 ### 3.2 内置模型