diff --git a/README.md b/README.md
index 627ab4f..5f617ae 100644
--- a/README.md
+++ b/README.md
@@ -33,6 +33,8 @@ an example workflow in `workflow` folder
 ## Parameters
 
 ```
-use_chop: process image with tiled operation, save lots vram 
+model_type: RGT and RGT-S model, former one usually better then the RGT-S
+upsacle: x2, x3, x4 upscale
+use_chop: process image with tiled operation, save lots vram
 ```