src/main/resources/templates/Content3.html

<!DOCTYPE html>
<html   xmlns:th="http://www.thymeleaf.org"
      xmlns:layout="http://www.ultraq.net.nz/thymeleaf/layout"
      layout:decorate="~{Template3}"
>

   
   <head th:replace="Template3 :: common_header(~{::title},~{::link})">

        <title>DEĞİŞTİRİLDİ TITTILE</title>
     
        <meta charset="UTF-8">
        
        <link rel="stylesheet" type="text/css" th:href="@{/resources/css/first.css}" >
        <link rel="stylesheet" type="text/css" th:href="@{/resources/css/second.css}" >
        <link rel="stylesheet" type="text/css" th:href="@{/resources/css/fourth.css}" >

 
   </head>
    
    
<body>
     
    <section  layout:fragment="head">
        <p>Head content here changed- CONTENT4</p>
    </section>
    
    <section layout:fragment="content">
      <p>This is a paragraph from content - CONTENT4</p>
      <p th:text="${message}"></p>
    </section>
    
    <footer>
      <p layout:fragment="footer">This is some footer content - CONTENT4</p>
    </footer>
</body>
</html>