From 451f3f71b81867ca841d7e27765bc0cd64992f48 Mon Sep 17 00:00:00 2001
From: alanhsieh4444 <110726422+alanhsieh4444@users.noreply.github.com>
Date: Wed, 8 Mar 2023 13:37:46 +0800
Subject: [PATCH] Update molecule.rst

---
 doc/src/molecule.rst | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/doc/src/molecule.rst b/doc/src/molecule.rst
index 5dcd30f508..c3c578f5ec 100644
--- a/doc/src/molecule.rst
+++ b/doc/src/molecule.rst
@@ -121,6 +121,11 @@ molecule (header keyword = inertia).
    ensure space is allocated for storing topology info for molecules that
    are added later.
 
+----------
+
+Format of a molecule file
+"""""""""""""""""""""
+
 The format of an individual molecule file is similar but
 (not identical) to the data file read by the :doc:`read_data <read_data>`
 commands, and is as follows.