Merge pull request #22766 from abpframework/auto-merge/rel-9-2/3691

Merge branch dev with rel-9.2

docs/en/ui-themes/lepton-x/mvc.md

@@ -47,7 +47,8 @@ Before starting to customize the theme, you can consider downloading the source
 ---
 
 ### Appearance
-You can set a default theme, add or remove appearance styles by using **LeptonXThemeOptions**.
+
+You can set a default theme, add or remove appearance styles and layout background styles by using **LeptonXThemeOptions**.
 
 - `DefaultStyle`: Defines the default fallback theme. The default value is **Dim**
   
@@ -133,15 +134,26 @@ Layout options of the MVC Razor Pages UI can be manageable by using **LeptonXThe
 
 - `MobileMenuSelector`: Defines items to be displayed at the mobile menu. The default value is the first 2 items from the main menu items.
 
+    ```csharp
+    Configure<LeptonXThemeMvcOptions>(options =>
+    {
+        options.MobileMenuSelector = items => items.Where(x => x.MenuItem.Name == "MyProjectName.Home" || x.MenuItem.Name == "MyProjectName.Dashboard");
+    });
+    ```
+
     ![leptonx-mobile-menu-preview](images/mobile-menu-preview.png)
 
+- `AccountLayoutBackgroundStyle`: Defines the background style of the account layout.
+
     ```csharp
     Configure<LeptonXThemeMvcOptions>(options =>
     {
-        options.MobileMenuSelector = items => items.Where(x => x.MenuItem.Name == "MyProjectName.Home" || x.MenuItem.Name == "MyProjectName.Dashboard");
+        options.AccountLayoutBackgroundStyle = "background-image: url('/images/login-background-image.svg') !important;";
     });
     ```
 
+    ![leptonx-account-layout-background-style](images/account-layout-background-style.png)
+
 ### Layouts
 
 **LeptonX** offers two **ready-made layouts** for your web application. One of them is **placed** with the **menu items** on the **top** and the other with the **menu items** on the **sides**.