diff --git a/docs/tree/index.md b/docs/tree/index.md
index 9b53cbd..d1cfe98 100644
--- a/docs/tree/index.md
+++ b/docs/tree/index.md
@@ -31,6 +31,9 @@ graph TB
   N1 --> M2[Menu ...];
   N1 --> M3[Menu n];
 
+  N2 --> L1[...]
+  NX --> L2[...]
+
   M1 --> MN1[Node 1]
   M1 --> MN2[Node ...]
   M1 --> MN3[Node n]