Add module overview description in docs

content/en/docs/refguide/modeling/app-explorer/app/_index.md

@@ -35,6 +35,12 @@ For more information, see [Navigation](/refguide/navigation/).
 
 For more information, see [System Texts](/refguide/system-texts/).
 
+## Module Overview
+
+**Module overview** lists all modules in your app and provides basic information about each one, such as the local name and local version. 
+
+For more information, see [Module Overview](/refguide/module-overview/).
+
 ## Export Documentation {#export}
 
 Right-clicking the **App** allows you to export documentation. This exports an HTML file with all the documents in your app and their documentation.

content/en/docs/refguide/modeling/app-explorer/app/module-overview.md

@@ -0,0 +1,36 @@
+---
+title: "Module Overview"
+url: /refguide/module-overview/
+#If moving or renaming this doc file, implement a temporary redirect and let the respective team know they should update the URL in the product. See Mapping to Products for more details.
+---
+
+## Introduction
+
+  The **Module overview** gives you a single view of all the modules in your app and provides basic information about each one.
+
+  You can open **Module overview** in the following ways:
+
+  * In the **App Explorer**, double-click **Module overview**.                                            
+  * In MxDock, go to **App** > **Tools** > **Module Overview**.
+
+## Toolbar 
+
+### View in Marketplace
+
+  Select a module and click **View in Marketplace** to open the module's page in the **Marketplace** pane in Studio Pro. This option is available only for Marketplace modules. 
+
+### Update 
+
+  Click **Update** and choose **From file** to update the selected module. This works the same way as updating a module from the App Explorer.
+
+## Module List
+
+  The module list shows every module in your app with the following columns:
+
+  | Column | Description |
+  | --- | --- |
+  | **Local name** | The name displayed for the module in the App Explorer. |                                                          
+  | **Local version** | The version of the module that is currently in the app. |
+
+
+