diff --git a/webassets/iframe_visavis.html b/webassets/iframe_visavis.html
index 44ceab5..924c6fc 100644
--- a/webassets/iframe_visavis.html
+++ b/webassets/iframe_visavis.html
@@ -91,6 +91,12 @@
     window.addEventListener('hashchange', function(){
         url_redraw_react();
     });
+
+    window.plot.on_fixel_checked = (checked) => {
+        const link = window.plot.json_request();
+        visavis_plot.json_request( checked ? `${link}&fixel=1` : link.replace('&fixel=1', '') );
+    }
+
 })();
 </script>
 </head>