diff --git a/README.md b/README.md
index c55f226..e4f1ac7 100644
--- a/README.md
+++ b/README.md
@@ -47,18 +47,23 @@ $ ./sdl-glisseur_10
 $ top  (or ps ax)  ---> get PID of the glider proccess
 $ kill -9 PID
 ```
+
 - - - - - - -
 # Adjust image size
-Update i and j on lines 122 and 123
+Update WIDTH and HEIGHT on lines 36 and 37
 ```
-    i=320;
-    j=240;
+#define WIDTH 640
+#define HEIGHT 480
 ```
 
 - - - - - - - 
 # Change glider moving rules
 Update the direction adding parameters, check examples from line 158 to line 205
 
+- - - - - - - 
+# Border bounce or pass through
+Comment / uncomment bounce and pass through blocks  on line 288 to 351
+
 - - - - - - -
 # Let's glide !