diff --git a/README.md b/README.md
index fb93b7e..f2ab6ca 100644
--- a/README.md
+++ b/README.md
@@ -270,6 +270,8 @@ Reveal.initialize({
 	hideAddressBar: true,
 
 	// Opens links in an iframe preview overlay
+	// Add `data-preview-link` and `data-preview-link="false"` to customise each link
+	// individually
 	previewLinks: false,
 
 	// Transition style
diff --git a/js/reveal.js b/js/reveal.js
index f125c55..c371371 100644
--- a/js/reveal.js
+++ b/js/reveal.js
@@ -145,6 +145,8 @@
 			hideAddressBar: true,
 
 			// Opens links in an iframe preview overlay
+			// Add `data-preview-link` and `data-preview-link="false"` to customise each link
+			// individually
 			previewLinks: false,
 
 			// Exposes the reveal.js API through window.postMessage