diff --git a/Windows/CS/Framework4.0/Camera/Camera/Setting.cs b/Windows/CS/Framework4.0/Camera/Camera/Setting.cs
index 7402e99..26c04e4 100644
--- a/Windows/CS/Framework4.0/Camera/Camera/Setting.cs
+++ b/Windows/CS/Framework4.0/Camera/Camera/Setting.cs
@@ -874,18 +874,24 @@ namespace Camera
             float scaleY = (float)picBoxCamera.ClientSize.Height / imageHeight;
             Point imagePoint = new Point((int)(e.Location.X / scaleX), (int)(e.Location.Y / scaleY));
 
-            if (_isDrawing && !_isMoving)
+            if (_isDrawing)
             {
                 int x = Math.Min(_startPoint.X, imagePoint.X);
                 int y = Math.Min(_startPoint.Y, imagePoint.Y);
                 int width = Math.Abs(imagePoint.X - _startPoint.X);
                 int height = Math.Abs(imagePoint.Y - _startPoint.Y);
 
-                if (width > 10 && height > 10)
+                if (width > 5 && height > 5)
                 {
                     if (_isDrawingLedMode)
                     {
+                        // 确保是新增LED区，而不是修改现有LED区
                         int newIndex = _camera.GetLedZoneCount() + 1;
+                        // 确保新索引不与现有索引冲突
+                        while (_camera.GetLedZones().ContainsKey(newIndex))
+                        {
+                            newIndex++;
+                        }
                         _camera.AddLedZone(newIndex, new Rectangle(x, y, width, height), Color.Lime);
                         _selectedZoneIndex = newIndex;
                         _currentLedIndex = newIndex;