diff --git a/src/app.cpp b/src/app.cpp
index e79f80b..5db2eda 100644
--- a/src/app.cpp
+++ b/src/app.cpp
@@ -1067,6 +1067,8 @@ nlohmann::json App::baseTemplateData(const httplib::Request& req) const
     }
     data["stylesheets"] = theme_manager.stylesheets(theme);
     data["current_theme"] = theme;
+    data["nav_center"] = config.substitutions.nav_center;
+    data["after_post"] = config.substitutions.after_post;
     return data;
 }
 
diff --git a/src/config.cpp b/src/config.cpp
index 0da9a98..07c75b7 100644
--- a/src/config.cpp
+++ b/src/config.cpp
@@ -98,5 +98,19 @@ E<Configuration> Configuration::fromYaml(const std::filesystem::path& path)
     {
         tree["default-theme"] >> config.default_theme;
     }
+    if(tree["substitutions"].has_key())
+    {
+        if(tree["substitutions"]["nav-center"].has_key())
+        {
+            tree["substitutions"]["nav-center"] >>
+                config.substitutions.nav_center;
+        }
+        if(tree["substitutions"]["after-post"].has_key())
+        {
+            tree["substitutions"]["after-post"] >>
+                config.substitutions.after_post;
+        }
+    }
+
     return E<Configuration>{std::in_place, std::move(config)};
 }
diff --git a/src/config.hpp b/src/config.hpp
index 0f90db3..44c3ea1 100644
--- a/src/config.hpp
+++ b/src/config.hpp
@@ -8,6 +8,12 @@
 
 #include "error.hpp"
 
+struct Substitutions
+{
+    std::string nav_center;
+    std::string after_post;
+};
+
 struct Configuration
 {
     using StringMap = std::unordered_map<std::string, std::string>;
@@ -23,6 +29,7 @@ struct Configuration
     std::vector<std::string> languages;
     std::string blog_title;
     std::string default_theme;
+    Substitutions substitutions;
 
     StringMap vars;
     StringMap custom_vars;
diff --git a/templates/footer.html b/templates/footer.html
new file mode 100644
index 0000000..584e0b3
--- /dev/null
+++ b/templates/footer.html
@@ -0,0 +1,6 @@
+<footer>
+  <a href="{{ url_for("feed") }}">Feed</a>
+  <span>
+    Powered by <a href="https://github.com/MetroWind/planck-blog">Planck Blog</a>
+  </span>
+</footer>
diff --git a/templates/nav.html b/templates/nav.html
index f4d0085..46605c4 100644
--- a/templates/nav.html
+++ b/templates/nav.html
@@ -18,7 +18,7 @@
     {% endif %}
   </span>
 
-  <span id="NavCenter"></span>
+  <span id="NavCenter">{{ nav_center }}</span>
 
   <span id="NavRight"><label for="SelectTheme">Theme</label>
     <select name="theme" id="SelectTheme">
diff --git a/templates/post.html b/templates/post.html
index 06da3a0..d8a1a51 100644
--- a/templates/post.html
+++ b/templates/post.html
@@ -34,7 +34,12 @@ <h1>{{ post.title }}</h1>
           </div>
           <div id="PostBody">{{ post.content }}</div>
         </article>
+        <hr/>
+        <div id="AfterPost">
+          {{ after_post }}
+        </div>
       </main>
+      {% include "footer.html" %}
     </div>
   </body>
 </html>
diff --git a/themes/generic/1-styles.css b/themes/generic/1-styles.css
index e954da3..0b646f2 100644
--- a/themes/generic/1-styles.css
+++ b/themes/generic/1-styles.css
@@ -3,6 +3,11 @@ body
     line-height: 1.5;
 }
 
+pre
+{
+    line-height: 1.3;
+}
+
 h1, h2, h3, h4, h5, h6
 {
     margin: 1.5em 0;
@@ -66,6 +71,20 @@ code, pre
     display: none;
 }
 
+nav
+{
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+}
+
+footer
+{
+    display: flex;
+    justify-content: center;
+    gap: 4em;
+}
+
 #Post img
 {
     max-width: 100%;
diff --git a/themes/planck/styles.css b/themes/planck/styles.css
index 3a0a05a..f68ceae 100644
--- a/themes/planck/styles.css
+++ b/themes/planck/styles.css
@@ -9,7 +9,7 @@ body
     font-size: 19px;
 }
 
-nav
+nav, footer
 {
     background-color: var(--color-alt-bg);
     font-size: 80%;
@@ -34,6 +34,16 @@ code, pre
     font-size: 95%;
 }
 
+pre, ul, ol
+{
+    margin: 0.8em 0;
+}
+
+nav ul
+{
+    margin: 0;
+}
+
 p
 {
     margin: unset;
@@ -65,11 +75,20 @@ p:first-of-type, pre p, h2 + p, h3 + p, h4 + p, h5 + p, h6 + p
     text-indent: unset;
 }
 
-nav
+.imageblock, #Post > #PostBody p:has(> img:only-child)
+{
+    text-align: center;
+    text-indent: 0px;
+    margin-top: 0.7em;
+    margin-bottom: 0.7em;
+}
+
+hr
 {
-    display: flex;
-    justify-content: space-between;
-    align-items: center;
+    width: 64px;
+    height: 4px;
+    background-color: var(--color-alt-bg);
+    border: none;
 }
 
 #Menu
@@ -157,7 +176,12 @@ h1.PostTitle > a
 
 #PostBody
 {
-    margin: 1em 0 4em 0;
+    margin: 1em 0 3em 0;
+}
+
+#AfterPost
+{
+    margin: 3em 0;
 }
 
 #FormPost