Update Customization-Overriding-Components.md

docs/en/UI/Blazor/Customization-Overriding-Components.md

@@ -6,6 +6,8 @@ This document explains how to override the user interface of a depended [applica
 
 The ABP Framework, pre-built themes and modules define some **re-usable razor components and pages**. These pages and components can be replaced by your application or module.
 
+> Since pages are just the razor components, the same principle is valid for pages too.
+
 ### Example: Replacing the Branding Area
 
 The screenshot below was taken from the [Basic Theme](Basic-Theme.md) comes with the application startup template.
@@ -46,6 +48,8 @@ Now, you can run the application to see the result:
 
 ![bookstore-added-logo](D:/Github/abp/docs/en/images/bookstore-added-logo.png)
 
+> Since the component inherits from the component it is replacing, you can use all the non-private fields/properties/methods of the base component in the derived component.
+
 ### Example: Replacing with the Code Behind File
 
 If you prefer to use code-behind file for the C# code of your component, you can use the attributes in the C# side.
@@ -77,3 +81,8 @@ namespace MyProject.Blazor.Components
 }
 ````
 
+## Theming
+
+The [Theming](Theming.md) system allows you to build your own theme. You can create your theme from scratch or get the [Basic Theme](Basic-Theme.md) and change however you like.
+
+## Manipulating the Bundles