Update index.rst

diff --git a/docs/index.rst b/docs/index.rst
index 1f4674eef4c36b14abd0e69725748c07d176d9ab..df10ba63b53b29e32f8f7ea63a4a5c4d67e3253c 100644 (file)
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -74,8 +74,11 @@ You can try it with:
 \r
     rainbowstream -iot # Or rainbowstream --image-on-term\r
 \r
-You also can change the config key ``IMAGE_ON_TERM`` to ``True`` inside the app\r
-to enable above feature (see `config management`_ section).\r
+You also can change the config key ``IMAGE_ON_TERM`` to ``True`` inside the app \r
+to enable above feature, \r
+change ``IMAGE_SHIFT`` to set image's margin (relative to your terminal's width) \r
+or ``IMAGE_MAX_HEIGHT`` to control max height of every image.\r
+(see `config management`_ section).\r
 \r
 In the first time you will be asked for authorization of Rainbow Stream\r
 app at Twitter. Just click the “Authorize access” button and paste PIN\r