diff --git a/demo/client/css/pathfinder-doc.css b/demo/client/css/pathfinder-doc.css
index f95fd42c..43c5033b 100644
--- a/demo/client/css/pathfinder-doc.css
+++ b/demo/client/css/pathfinder-doc.css
@@ -27,3 +27,6 @@ nav.sidebar {
 img {
     max-width: inherit !important;
 }
+h4 > span.invisible {
+    visibility: visible !important;
+}