From 90164f0c5803bf5caddf0227e07fea342d951bf0 Mon Sep 17 00:00:00 2001
From: freemedom <57294686+freemedom@users.noreply.github.com>
Date: Thu, 25 May 2023 16:33:34 +0800
Subject: [PATCH] Update index.md

---
 docs/observations/index.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/observations/index.md b/docs/observations/index.md
index 37967dd2a..c15dacf7e 100644
--- a/docs/observations/index.md
+++ b/docs/observations/index.md
@@ -53,7 +53,7 @@ For instance:
 | vehicle V   | 22.2  | 10.5 | 18.0  | 0.5   |
 
 ```{note}
-The ego-vehicle is always described in the first row
+The ego-vehicle is always described in the first row. The default is 'presence', 'x', 'y', 'vx', 'vy', five features.
 ```
 
 If configured with `normalize=True` (default), the observation is normalized within a fixed range, which gives for