diff --git a/docs/conf.py b/docs/conf.py
index 9fb8734..15b0712 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -55,7 +55,6 @@
     'sphinxcontrib.collections',
     'sphinxcontrib.jquery', # https://github.com/sphinx-contrib/jquery
     'sphinx_preview',
-    'sphinx_immaterial',
 ]
 
 templates_path = ['_templates']
@@ -84,7 +83,7 @@
     # A list of selectors, where no preview icon shall be added, because it makes often no sense.
     # For instance the own ID of a need object, or the link on an image to open the image.
     #"not_selector": "div.needs_head a, h1 a, h2 a, a.headerlink, a.md-content__button, a.image-reference, em.sig-param a, a.paginate_button",
-    #"not_selector": "div.needs_head a, h1 a, h2 a, a.headerlink, a.md-content__button, a.image-reference, em.sig-param a, a.paginate_button, a.sd-btn",
+    "not_selector": "div.needs_head a, h1 a, h2 a, a.headerlink, a.md-content__button, a.image-reference, em.sig-param a, a.paginate_button, a.sd-btn",
     #"not_selector": "div.needs_head a, h1 a, h2 a",
     "set_icon": True,
     "icon_only": True,
@@ -107,46 +106,46 @@
 
 # Set ``html_theme`` to ``sphinx_immaterial`` only, if we do NOT perform a PDF build.
 if os.environ.get("PDF", 0) != 1:
-   extensions.append("sphinx_immaterial")
-   html_theme = 'sphinx_immaterial'
-
-html_theme_options = {
-    "font": False,
-    "icon": {
-        "repo": "fontawesome/brands/github",
-        "edit": "material/file-edit-outline",
-    },
-    "site_url": "https://jbms.github.io/sphinx-immaterial/",
-    "repo_url": "https://github.dev/PhilipPartsch/ReConf2023-Product-As-Code",
-    "repo_name": "ReConf2023-Product-As-Code",
-    "edit_uri": "blob/main/docs",
-    "globaltoc_collapse": True,
-    "features": [
-        "navigation.expand",
-        # "navigation.tabs",
-        # "toc.integrate",
-        "navigation.sections",
-        # "navigation.instant",
-        # "header.autohide",
-        "navigation.top",
-        # "navigation.tracking",
-        "search.highlight",
-        "search.share",
-        "toc.follow",
-        "toc.sticky",
-        "content.tabs.link",
-        "announce.dismiss",
-    ],
-    "palette": [
-        {
-            "media": "(prefers-color-scheme: light)",
-            "scheme": "default",
-            "primary": "blue",
-            "accent": "light-cyan",
+    extensions.append("sphinx_immaterial")
+    html_theme = 'sphinx_immaterial'
+
+    html_theme_options = {
+        "font": False,
+        "icon": {
+            "repo": "fontawesome/brands/github",
+            "edit": "material/file-edit-outline",
         },
-    ],
-    "toc_title_is_page_title": True,
-}
+        "site_url": "https://jbms.github.io/sphinx-immaterial/",
+        "repo_url": "https://github.dev/PhilipPartsch/ReConf2023-Product-As-Code",
+        "repo_name": "ReConf2023-Product-As-Code",
+        "edit_uri": "blob/main/docs",
+        "globaltoc_collapse": True,
+        "features": [
+            "navigation.expand",
+            # "navigation.tabs",
+            # "toc.integrate",
+            "navigation.sections",
+            # "navigation.instant",
+            # "header.autohide",
+            "navigation.top",
+            # "navigation.tracking",
+            "search.highlight",
+            "search.share",
+            "toc.follow",
+            "toc.sticky",
+            "content.tabs.link",
+            "announce.dismiss",
+        ],
+        "palette": [
+            {
+                "media": "(prefers-color-scheme: light)",
+                "scheme": "default",
+                "primary": "blue",
+                "accent": "light-cyan",
+            },
+        ],
+        "toc_title_is_page_title": True,
+    }
 
 html_css_files = ['custom.css']