diff --git a/src/screenshotdisplay.cpp b/src/screenshotdisplay.cpp
index b87844e..b693546 100644
--- a/src/screenshotdisplay.cpp
+++ b/src/screenshotdisplay.cpp
@@ -685,8 +685,8 @@ void ScreenshotDisplay::drawArrow(QPainter& painter, const QPoint& start, const
 
     double angle = std::atan2(start.y() - end.y(), start.x() - end.x());
 
-    const double arrowHeadLength = borderWidth * 2;
-    const double arrowHeadAngle = M_PI / 6;
+    const double arrowHeadLength = borderWidth * 5;
+    const double arrowHeadAngle = M_PI / 15;
 
     QPoint arrowP1 = end + QPoint(std::cos(angle + arrowHeadAngle) * arrowHeadLength,
         std::sin(angle + arrowHeadAngle) * arrowHeadLength);
@@ -742,12 +742,12 @@ void ScreenshotDisplay::finalizeTextEdit() {
 }
 
 void ScreenshotDisplay::saveStateForUndo() {
-    undoStack.push(drawingPixmap);
+    undoStack.push(originalPixmap);
 }
 
 void ScreenshotDisplay::undo() {
     if (!undoStack.empty()) {
-        drawingPixmap = undoStack.top();
+        originalPixmap = undoStack.top();
         undoStack.pop();
         update();
     }