diff --git a/images/demo/tray.png b/images/demo/tray.png
new file mode 100644
index 0000000..7521e1f
Binary files /dev/null and b/images/demo/tray.png differ
diff --git a/readme.md b/readme.md
index 63e182e..fd162da 100644
--- a/readme.md
+++ b/readme.md
@@ -12,7 +12,9 @@ Requirements
   * [`QImage::Format_Grayscale16`](https://doc.qt.io/qt-5/qimage.html#Format-enum) was added in Qt 5.13 (released [June 19th, 2019](https://blog.qt.io/blog/2019/06/19/qt-5-13-released/)). References: [QTBUG-41176](http://bugreports.qt.io/browse/QTBUG-41176), [Gerrit patch](https://codereview.qt-project.org/#/c/239203/)
 
 # Log
-add tray mode
+Version: 2.1
+* add tray mode
+![tray](https://github.com/renhaofan/colormap/blob/master/images/demo/tray.png)