diff --git a/options/edit.yaml b/options/edit.yaml
index 66ebe72..b754c53 100644
--- a/options/edit.yaml
+++ b/options/edit.yaml
@@ -39,4 +39,4 @@ style_tranfer:
 grounded_generation:
   use: False
 
-indexnum: 3
+indexnum: 3                             # the number of words that will be recorded.