diff --git a/CampusPulugin/CanvasWindow.xaml.cs b/CampusPulugin/CanvasWindow.xaml.cs
index 2f3e513..1acde6a 100644
--- a/CampusPulugin/CanvasWindow.xaml.cs
+++ b/CampusPulugin/CanvasWindow.xaml.cs
@@ -1,4 +1,4 @@
-using System.Windows.Controls;
+using System.Windows.Controls;
 using System.Windows;
 using Microsoft.Win32;
 using System.Windows.Media.Imaging;
@@ -225,7 +225,6 @@ private void ShowTextEditorModal(Border border)
             bool initialIsItalic = textBlock.FontStyle == FontStyles.Italic;
             bool initialIsUnderline = textBlock.TextDecorations != null && textBlock.TextDecorations.Contains(TextDecorations.Underline[0]);
 
-
             Type? editorWindowType = Type.GetType("CanvasPlugin.TextEditWindow");
             if (editorWindowType == null)
             {
@@ -324,7 +323,6 @@ private void ShowTextEditorModal(Border border)
                         textBlock.FlowDirection = FlowDirection.LeftToRight;
                         textBlock.TextWrapping = TextWrapping.Wrap;
                     }
-
                 }
             }
 
@@ -511,7 +509,6 @@ private ContextMenu CreateContextMenu(FrameworkElement element)
             deleteItem.Click += (s, e) => DeleteElement(element);
             contextMenu.Items.Add(deleteItem);
 
-
             MenuItem bringForwardItem = new MenuItem
             {
                 Header = "一つ手前へ移動",
@@ -585,7 +582,6 @@ private void ChangeZOrder(UIElement? element, ZOrderChangeType changeType)
 
                 int maxZ = children.OfType<UIElement>().Select(System.Windows.Controls.Panel.GetZIndex).DefaultIfEmpty(0).Max();
                 System.Windows.Controls.Panel.SetZIndex(element, maxZ + 1);
-
             }
             else if (changeType == ZOrderChangeType.SendToBack)
             {
@@ -594,7 +590,6 @@ private void ChangeZOrder(UIElement? element, ZOrderChangeType changeType)
 
                 int minZ = children.OfType<UIElement>().Select(System.Windows.Controls.Panel.GetZIndex).DefaultIfEmpty(0).Min();
                 System.Windows.Controls.Panel.SetZIndex(element, minZ - 1);
-
             }
             else
             {
@@ -633,7 +628,6 @@ private void ChangeZOrder(UIElement? element, ZOrderChangeType changeType)
             }
         }
 
-
         private void ContextMenu_BringToFront(object sender, RoutedEventArgs e)
         {
             MenuItem? item = sender as MenuItem;
@@ -692,7 +686,6 @@ public void StickyNoteButton_Click(object sender, RoutedEventArgs e)
                 VerticalAlignment = System.Windows.VerticalAlignment.Center,
                 HorizontalAlignment = HorizontalAlignment.Stretch,
 
-
                 FontFamily = new System.Windows.Media.FontFamily("Segoe UI"),
                 FontSize = 30,
                 Foreground = Brushes.Black,
@@ -1127,7 +1120,7 @@ public void MainCanvas_Drop(object sender, DragEventArgs e)
                             };
 
                             Point dropPoint = e.GetPosition(MainCanvas);
-                            AddElementToCanvas(newImage, dropPoint.X - newImage.Width / 2, dropPoint.Y - newImage.Height / 2);
+                            AddElementToCanvas(newImage, dropPoint.X - (newImage.Width / 2), dropPoint.Y - (newImage.Height / 2));
                             SelectElement(newImage);
                         }
                         catch (Exception ex)