diff --git a/docs/lib3x-mz_hamiltonian.md b/docs/lib3x-mz_hamiltonian.md
index 0590f15d..7733f095 100644
--- a/docs/lib3x-mz_hamiltonian.md
+++ b/docs/lib3x-mz_hamiltonian.md
@@ -9,6 +9,7 @@ Creates a hamiltonian path from a maze. The path is the result of maze traversal
 - `rows` : The rows of a maze.
 - `columns` : The columns of a maze.
 - `start` : The start point to travel the maze. Default to `[0, 0]`.
+- `init_cells` : You can define your own initial cell data, a 2-dimension list of `[x, y, type, visited]`. `visited` means the cell is visited or not. A visited cell won't be visited when traveling the maze. If you don't provide `init_cells`, `mz_square` will generate one automatically. If you provide `init_cells`, `rows` and `columns` will be ignored. **Since:** 3.3
 - `seed` : The maze is traveling randomly. Use `seed` to initialize the pseudorandom number generator.
 
 ## Examples
diff --git a/src/experimental/note.md b/src/experimental/note.md
index d68fed40..6fa9e64b 100644
--- a/src/experimental/note.md
+++ b/src/experimental/note.md
@@ -1,12 +1,9 @@
 to_do:
 
-- doc: sf, stereographic_extrude add convexity
 
 new:
 
-- mz_hamiltonian supports init_cells
-
-   update doc mz_square_initialize
+- update doc mz_square_initialize
 
 - surface/sf_cylinder?
 - noise/worley_sphere?
@@ -32,3 +29,5 @@ doc-ed
 
     - lsystem2, lsystem3, add seed param
     - t3d - roll/pitch/turn/forward
+    - sf, stereographic_extrude add convexity
+    - mz_hamiltonian supports init_cells
\ No newline at end of file