Index: doc/build.md
==================================================================
--- doc/build.md
+++ doc/build.md
@@ -1,36 +1,36 @@
 
-BUILDER
+# BUILDER
 
-# Required #
+## Required ##
 
     Python 3.6
     Firefox Nightly
     NodeJS
         npm
         jpm
     Thunderbird
 
 
-# Commands #
+## Commands ##
 
-## build a language ##
+### build a language ###
 
     make.py LANG
         generate the LibreOffice extension and the package folder.
         LANG is the lang code (ISO 639).
 
         This script uses the file `config.ini` in the folder `gc_lang/LANG`.
 
-## First build ##
+### First build ###
 
     Type:
         make.py LANG -js
 
     This command is required to generate all necessary files.
 
-## options ##
+### options ###
 
     -b --build_data
         Launch the script `build_data.py` in the folder `gc_lang/LANG`.
 
     -d --dict
@@ -52,11 +52,11 @@
 
     -tb --thunderbird
         Launch Thunderbird.
 
 
-# Examples #
+## Examples ##
 
     Full rebuild:
         make.py LANG -b -d -js
 
     After modifying grammar rules: