diff --git a/galaxy-react/readme.md b/galaxy-react/readme.md
index fd8e019..1faddf4 100644
--- a/galaxy-react/readme.md
+++ b/galaxy-react/readme.md
@@ -12,7 +12,13 @@ $ npm run start
 # npm install three three-stdlib @types/three @react-three/fiber @react-three/fiber @react-three/drei @react-three/postprocessing
 ```
 
+## tips
+
+- `?ms=0`
+- `?g=moon`
+
 ## ref
 
 - galaxy.glb : https://sketchfab.com/3d-models/need-some-space-d6521362b37b48e3a82bce4911409303
 - tsx : https://gist.github.com/artokun/fb7f0c68a01ba5d9813abb3ccce254c4
+