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+<!-- ---
+title: Navigation
+nav_order: 5
+---
+
+# Navigation
+
+The default page layout supports various navigation features:
+
+* a **main navigation** panel, highlighting the currently selected page;
+* a list of **auxiliary** links, shown on all pages;
+* lists of **breadcrumbs**, shown on all except top level pages;
+* optional lists of links to **child pages** (so-called 'tables of contents'); and
+* section heading links for **in-page navigation**, with an optional **back-to-top** link.
+
+See the following pages for how to specify these features, with illustrative examples. -->