diff --git a/README.md b/README.md
index a9a4850..9786461 100644
--- a/README.md
+++ b/README.md
@@ -207,6 +207,20 @@ cmd.remove("resn K or resn MG or resn SF4 or resn ZN")
 cmd.remove("resn K or resn MG or resn SF4 or resn ZN")
 ```
 
+## 一些用法笔记
+
+```bash
+# 关闭阴影渲染
+set ray_shadows, off
+set ray_shadow, 0.2
+# 透明度
+set transparency_mode, 2 # 会优化表面渲染效果，半透明看起来更自然。
+set transparency, 0.5
+# 创建蛋白质与核苷酸对象 
+create Protein_obj, polymer.protein
+create RNA_obj, resn A+U+G+C+RA+RU+RG+RC
+```
+
 ## Schrodinger_Suites linux install 
 
 ```shell