diff --git a/topics/basics/basic_action_system.md b/topics/basics/basic_action_system.md
index 4cc744301..4cfe64b7f 100644
--- a/topics/basics/basic_action_system.md
+++ b/topics/basics/basic_action_system.md
@@ -2,6 +2,8 @@
 
 <!-- Copyright 2000-2022 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license. -->
 
+<link-summary>Adding custom actions to IntelliJ Platform-based IDEs menus and toolbar.</link-summary>
+
 <tldr>
 
 **Product Help:** [Menus and toolbars](https://www.jetbrains.com/help/idea/customize-actions-menus-and-toolbars.html)