diff --git a/pages/WindowDance.md b/pages/WindowDance.md
index 4f709b9..37da2b9 100644
--- a/pages/WindowDance.md
+++ b/pages/WindowDance.md
@@ -30,7 +30,7 @@
 
 `边缘`的范围是整个屏幕减去窗口大小，如果将位置设置为（0,0），那么窗口的左下角将对齐屏幕左下角。
 
-![](../images/edge.png)
+![居中和边缘](../images/edge.png)
 
 ### 摇摆