diff --git a/src/mixins/menubar.js b/src/mixins/menubar.js
index 2d802fafc27..2215918cea0 100644
--- a/src/mixins/menubar.js
+++ b/src/mixins/menubar.js
@@ -251,6 +251,7 @@ export default [
 	{
 		label: t('text', 'Formatting help'),
 		class: 'icon-help',
+		// receive component instance to handle custom actions
 		click: (view) => view.$emit('show-help'),
 		priority: 17,
 	},