diff --git a/docs/ServicesPortfolio/index.md b/docs/ServicesPortfolio/index.md
new file mode 100644
index 00000000..3ab8399e
--- /dev/null
+++ b/docs/ServicesPortfolio/index.md
@@ -0,0 +1,7 @@
+# Service and Portfolio
+
+Here you can find a short description of all services provided by the 
+Controls section. If you are interested in who is responsible for which
+service, look in the "Contacts and Support" part of this webpage.
+
+
diff --git a/zensical.toml b/zensical.toml
index 5f430c63..80f50e0c 100644
--- a/zensical.toml
+++ b/zensical.toml
@@ -51,10 +51,17 @@ Copyright © 2026 Paul Scherrer Institut
 # can be defined using TOML syntax.
 #
 # Read more: https://zensical.org/docs/setup/navigation/
-# nav = [
-#   { "Get started" = "index.md" },
-#   { "Markdown in 5min" = "markdown.md" },
-# ]
+
+ nav = [
+   { "Home" = [
+   "index.md",
+   "UsefulLinks.md"
+   ]},
+   { "Services & Portfolio" = "ServicesPortfolio/index.md" },
+   { "Knowledge Center" = "KnowledgeCenter/index.md" },
+   { "Contacts & Support" = "ContactsSupport/index.md" },
+   { "Controls Internal" = "ControlsInternal/index.md" },
+ ]
 
 # With the "extra_css" option you can add your own CSS styling to customize
 # your Zensical project according to your needs. You can add any number of