diff --git a/doc/main.conf b/doc/main.conf
index 98f447a7..f3bf2d81 100644
--- a/doc/main.conf
+++ b/doc/main.conf
@@ -1,4 +1,16 @@
+# Note: The lines starting with # are ignored. To enable any of the
+# configuration options below, remove # from the beginning of a respective line.
+
 [EAP]
 mtu=1400
+
 [EAPoL]
 max_4way_handshake_time=2
+
+[Scan]
+#
+# Disable periodic scan. Setting this option to 'true' will prevent iwd from
+# issuing the periodic scans for the available networks while disconnected.
+# The behavior of the user-initiated scans isn't affected.
+# The periodic scan is enabled by default.
+#disable_periodic_scan=true