diff --git a/build.gradle b/build.gradle
index c367c95a..e915d503 100644
--- a/build.gradle
+++ b/build.gradle
@@ -25,8 +25,8 @@ asciidoctor {
         idprefix: '',  // for compatibility with GitHub preview
         idseparator: '-',
         'site-root': "${sourceDir}",  // must be the same as sourceDir, do not modify
-        'site-name': 'AddressBook-Level4',
-        'site-githuburl': 'https://github.com/se-edu/addressbook-level4',
+        'site-name': 'AddressBook-Level1',
+        'site-githuburl': 'https://github.com/se-edu/addressbook-level1',
         'site-seedu': true,  // delete this line if your project is not a fork (not a SE-EDU project)
     ]
 
diff --git a/docs/DeveloperGuide.adoc b/docs/DeveloperGuide.adoc
index 621ad074..3b0eba47 100644
--- a/docs/DeveloperGuide.adoc
+++ b/docs/DeveloperGuide.adoc
@@ -1,4 +1,5 @@
 = AddressBook Level 1 - Developer Guide
+:site-section: DeveloperGuide
 :stylesDir: stylesheets
 
 [[SettingUp]]
diff --git a/docs/LearningOutcomes.adoc b/docs/LearningOutcomes.adoc
index bdc1f6b9..e0c66dd6 100644
--- a/docs/LearningOutcomes.adoc
+++ b/docs/LearningOutcomes.adoc
@@ -1,4 +1,5 @@
 = Learning Outcomes
+:site-section: LearningOutcomes
 :toc: macro
 :toc-title:
 :toclevels: 1
diff --git a/docs/UserGuide.adoc b/docs/UserGuide.adoc
index 9a761550..52de6f0d 100644
--- a/docs/UserGuide.adoc
+++ b/docs/UserGuide.adoc
@@ -1,4 +1,5 @@
 = AddressBook Level 1 - User Guide
+:site-section: UserGuide
 :stylesDir: stylesheets
 ifdef::env-github[]
 :tip-caption: :bulb:
diff --git a/docs/templates/_header.html.slim b/docs/templates/_header.html.slim
index 1995d26a..fdac085f 100644
--- a/docs/templates/_header.html.slim
+++ b/docs/templates/_header.html.slim
@@ -7,13 +7,13 @@
           img src=(site_url 'images/SeEduLogo.png') alt='SE-EDU'
         ul.navbar-nav
           li.nav-item
-            a.nav-link href='https://se-edu.github.io/addressbook-level1' AB-1
+            a.nav-link.active href=(site_url 'index.html') AB-1
           li.nav-item
             a.nav-link href='https://se-edu.github.io/addressbook-level2' AB-2
           li.nav-item
             a.nav-link href='https://se-edu.github.io/addressbook-level3' AB-3
           li.nav-item
-            a.nav-link.active href=(site_url 'index.html') AB-4
+            a.nav-link href='https://se-edu.github.io/addressbook-level4' AB-4
           li.nav-item
             a.nav-link href='https://se-edu.github.io/collate' Collate
           li.nav-item
@@ -35,10 +35,6 @@
           - if attr? 'site-seedu'
             li.nav-item
               =nav_link('LearningOutcomes', 'LearningOutcomes.html', 'LOs')
-          li.nav-item
-            =nav_link('AboutUs', 'AboutUs.html', 'About Us')
-          li.nav-item
-            =nav_link('ContactUs', 'ContactUs.html', 'Contact Us')
           - if attr? 'site-githuburl'
             li.navitem
               a.nav-link href=(attr 'site-githuburl')