diff --git a/Ink Canvas/MainWindow.xaml.cs b/Ink Canvas/MainWindow.xaml.cs
index 4085e7b..ba01a3a 100644
--- a/Ink Canvas/MainWindow.xaml.cs	
+++ b/Ink Canvas/MainWindow.xaml.cs	
@@ -2240,6 +2240,8 @@ namespace Ink_Canvas
             LogHelper.WriteLogToFile("PowerPoint Application Slide Show Begin", LogHelper.LogType.Event);
             Application.Current.Dispatcher.Invoke(() =>
             {
+                // 退出画板模式
+                BtnSwitch_Click(null, null);
                 //调整颜色
                 double screenRatio = SystemParameters.PrimaryScreenWidth / SystemParameters.PrimaryScreenHeight;
                 if (Math.Abs(screenRatio - 16.0 / 9) <= -0.01)