diff --git a/TangDou/Geogebra/听课笔记.md b/TangDou/Geogebra/听课笔记.md
index 1dbf450..e2892b1 100644
--- a/TangDou/Geogebra/听课笔记.md
+++ b/TangDou/Geogebra/听课笔记.md
@@ -16,4 +16,7 @@
 
 
 #### 1.1 用工具和属性绘制简单图形
-![](https://dsideal.obs.cn-north-1.myhuaweicloud.com/HuangHai/BlogImages/202401311531627.png)
\ No newline at end of file
+![](https://dsideal.obs.cn-north-1.myhuaweicloud.com/HuangHai/BlogImages/202401311531627.png)
+
+
+$CTRL+F$可以擦除轨迹
\ No newline at end of file