diff --git a/Ink Canvas/MainWindow.xaml b/Ink Canvas/MainWindow.xaml
index e4109535..95f7ffc9 100644
--- a/Ink Canvas/MainWindow.xaml	
+++ b/Ink Canvas/MainWindow.xaml	
@@ -598,7 +598,7 @@
                                      <Bold>开发者:</Bold> XY Wang (WXRIW)
                                 </TextBlock>
                                 <TextBlock FontSize="14" TextWrapping="Wrap">
-                                     <Bold>贡献者:</Bold> Kengwang, Raspberry Kan, jiajiaxd, CN-Ironegg, Clover Yan, ZongziTEK, ChangSakura
+                                     <Bold>贡献者:</Bold> Kengwang, Raspberry Kan, jiajiaxd, CN-Ironegg, Clover Yan, STBBRD, ChangSakura
                                 </TextBlock>
                                 <TextBlock FontSize="14">
                                     <Bold>开源地址:</Bold>
diff --git a/Ink Canvas/MainWindow.xaml.cs b/Ink Canvas/MainWindow.xaml.cs
index 9670fa0d..dc13ed32 100644
--- a/Ink Canvas/MainWindow.xaml.cs	
+++ b/Ink Canvas/MainWindow.xaml.cs	
@@ -119,7 +119,7 @@ private void TimerKillProcess_Elapsed(object sender, ElapsedEventArgs e)
                     if (processes.Length > 0)
                     {
                         arg += " /IM SeewoIwbAssistant.exe" +
-                            " /IM Sia.Guard";
+                            " /IM Sia.Guard.exe";
                     }
                 }
                 if (Settings.Automation.IsAutoKillEasiNote)
@@ -249,7 +249,7 @@ private void Main_Grid_PreviewKeyDown(object sender, KeyEventArgs e)
         {
             if (StackPanelPPTControls.Visibility != Visibility.Visible || currentMode != 0) return;
 
-            if (e.Key == Key.Down || e.Key == Key.PageDown || e.Key == Key.Right || e.Key == Key.N)
+            if (e.Key == Key.Down || e.Key == Key.PageDown || e.Key == Key.Right || e.Key == Key.N || e.Key == Key.Space)
             {
                 BtnPPTSlidesDown_Click(BtnPPTSlidesDown, null);
             }
@@ -700,6 +700,14 @@ private void LoadSettings(bool isStartup = true)
             {
                 ToggleSwitchEnableTwoFingerZoom.IsOn = false;
             }
+            if (Settings.Gesture.IsEnableTwoFingerTranslate)
+            {
+                ToggleSwitchEnableTwoFingerTranslate.IsOn = true;
+            }
+            else
+            {
+                ToggleSwitchEnableTwoFingerTranslate.IsOn = false;
+            }
             if (Settings.Gesture.IsEnableTwoFingerRotation)
             {
                 ToggleSwitchEnableTwoFingerRotation.IsOn = true;
@@ -759,6 +767,8 @@ private void LoadSettings(bool isStartup = true)
                 ComboBoxPenStyle.SelectedIndex = Settings.Canvas.InkStyle;
 
                 ComboBoxEraserSize.SelectedIndex = Settings.Canvas.EraserSize;
+
+                ComboBoxHyperbolaAsymptoteOption.SelectedIndex = (int)Settings.Canvas.HyperbolaAsymptoteOption;
             }
             else
             {
@@ -1043,9 +1053,9 @@ private void BtnErase_Click(object sender, RoutedEventArgs e)
                     forcePointEraser = false;
                     break;
             }
+            inkCanvas.EraserShape = forcePointEraser ? new EllipseStylusShape(50, 50) : new EllipseStylusShape(5, 5);
             inkCanvas.EditingMode =
                 forcePointEraser ? InkCanvasEditingMode.EraseByPoint : InkCanvasEditingMode.EraseByStroke;
-            inkCanvas.EraserShape = forcePointEraser ? new EllipseStylusShape(50, 50) : new EllipseStylusShape(5, 5);
             drawingShapeMode = 0;
             GeometryDrawingEraser.Brush = forcePointEraser
                 ? new SolidColorBrush(Color.FromRgb(0x23, 0xA9, 0xF2))
@@ -1060,6 +1070,15 @@ private void BtnClear_Click(object sender, RoutedEventArgs e)
             forceEraser = false;
             BorderClearInDelete.Visibility = Visibility.Collapsed;
 
+            if (currentMode == 0) {
+                BorderPenColorRed_MouseUp(BorderPenColorRed, null);
+            } else {
+                if (Settings.Canvas.UsingWhiteboard) {
+                    BorderPenColorBlack_MouseUp(BorderPenColorBlack, null);
+                } else {
+                    BorderPenColorWhite_MouseUp(BorderPenColorWhite, null);
+                }
+            }
             if (inkCanvas.Strokes.Count != 0)
             {
                 int whiteboardIndex = CurrentWhiteboardIndex;
@@ -1147,6 +1166,7 @@ private void BtnSwitch_Click(object sender, RoutedEventArgs e)
                     }
                     StackPanelPPTButtons.Visibility = Visibility.Visible;
                 }
+                Topmost = true;
                 BtnHideInkCanvas_Click(BtnHideInkCanvas, e);
             }
             else
@@ -1186,6 +1206,7 @@ private void BtnSwitch_Click(object sender, RoutedEventArgs e)
                         }
 
                         StackPanelPPTButtons.Visibility = Visibility.Visible;
+                        Topmost = true;
                         break;
                     case 1: //黑板或白板模式
                         currentMode = 1;
@@ -1210,6 +1231,7 @@ private void BtnSwitch_Click(object sender, RoutedEventArgs e)
                         }
 
                         StackPanelPPTButtons.Visibility = Visibility.Collapsed;
+                        Topmost = false;
                         break;
                 }
             }
@@ -2288,8 +2310,11 @@ private void PptApplication_SlideShowBegin(SlideShowWindow Wn)
             LogHelper.WriteLogToFile("PowerPoint Application Slide Show Begin", LogHelper.LogType.Event);
             Application.Current.Dispatcher.Invoke(() =>
             {
-                // 退出画板模式
-                BtnSwitch_Click(null, null);
+                if (currentMode == 1) {
+                    // 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)
@@ -4122,7 +4147,10 @@ private void BtnDrawLine_Click(object sender, EventArgs e)
             lastMouseDownSender = null;
             if (isLongPressSelected)
             {
-                BorderDrawShape.Visibility = Visibility.Collapsed;
+                if (ToggleSwitchDrawShapeBorderAutoHide.IsOn)
+                {
+                    BorderDrawShape.Visibility = Visibility.Collapsed;
+                }
                 var dA = new DoubleAnimation(1, 1, new Duration(TimeSpan.FromMilliseconds(0)));
                 ImageDrawLine.BeginAnimation(OpacityProperty, dA);
             }
@@ -4141,7 +4169,10 @@ private void BtnDrawDashedLine_Click(object sender, EventArgs e)
             lastMouseDownSender = null;
             if (isLongPressSelected)
             {
-                BorderDrawShape.Visibility = Visibility.Collapsed;
+                if (ToggleSwitchDrawShapeBorderAutoHide.IsOn)
+                {
+                    BorderDrawShape.Visibility = Visibility.Collapsed;
+                }
                 var dA = new DoubleAnimation(1, 1, new Duration(TimeSpan.FromMilliseconds(0)));
                 ImageDrawDashedLine.BeginAnimation(OpacityProperty, dA);
             }
@@ -4160,7 +4191,10 @@ private void BtnDrawDotLine_Click(object sender, EventArgs e)
             lastMouseDownSender = null;
             if (isLongPressSelected)
             {
-                BorderDrawShape.Visibility = Visibility.Collapsed;
+                if (ToggleSwitchDrawShapeBorderAutoHide.IsOn)
+                {
+                    BorderDrawShape.Visibility = Visibility.Collapsed;
+                }
                 var dA = new DoubleAnimation(1, 1, new Duration(TimeSpan.FromMilliseconds(0)));
                 ImageDrawDotLine.BeginAnimation(OpacityProperty, dA);
             }
@@ -4179,7 +4213,10 @@ private void BtnDrawArrow_Click(object sender, EventArgs e)
             lastMouseDownSender = null;
             if (isLongPressSelected)
             {
-                BorderDrawShape.Visibility = Visibility.Collapsed;
+                if (ToggleSwitchDrawShapeBorderAutoHide.IsOn)
+                {
+                    BorderDrawShape.Visibility = Visibility.Collapsed;
+                }
                 var dA = new DoubleAnimation(1, 1, new Duration(TimeSpan.FromMilliseconds(0)));
                 ImageDrawArrow.BeginAnimation(OpacityProperty, dA);
             }
@@ -4198,7 +4235,10 @@ private void BtnDrawParallelLine_Click(object sender, EventArgs e)
             lastMouseDownSender = null;
             if (isLongPressSelected)
             {
-                BorderDrawShape.Visibility = Visibility.Collapsed;
+                if (ToggleSwitchDrawShapeBorderAutoHide.IsOn)
+                {
+                    BorderDrawShape.Visibility = Visibility.Collapsed;
+                }
                 var dA = new DoubleAnimation(1, 1, new Duration(TimeSpan.FromMilliseconds(0)));
                 ImageDrawParallelLine.BeginAnimation(OpacityProperty, dA);
             }
@@ -7070,8 +7110,6 @@ private void ImageBlackboard_MouseUp(object sender, MouseButtonEventArgs e)
             if (currentMode == 0)
             {
                 //进入黑板
-                Topmost = false;
-
                 if (BtnPPTSlideShowEnd.Visibility == Visibility.Collapsed)
                 {
                     pointDesktop = new Point(ViewboxFloatingBar.Margin.Left, ViewboxFloatingBar.Margin.Top);
@@ -7105,8 +7143,6 @@ private void ImageBlackboard_MouseUp(object sender, MouseButtonEventArgs e)
             else
             {
                 //关闭黑板
-                Topmost = true;
-
                 if (isInMultiTouchMode) BorderMultiTouchMode_MouseUp(null, null);
 
                 if (BtnPPTSlideShowEnd.Visibility == Visibility.Collapsed)