Resolved #3056: Guide to customize the pre-build application modules.

docs/en/Authorization.md

@@ -204,6 +204,10 @@ If you define and register a policy to the ASP.NET Core authorization system wit
 
 See [policy based authorization](https://docs.microsoft.com/en-us/aspnet/core/security/authorization/policies) document to learn how to define a custom policy.
 
+### Changing Permission Definitions of a Depended Module
+
+A class deriving from the `PermissionDefinitionProvider` (just like the example above) can also get existing permission definitions (defined by the depended [modules](Module-Development-Basics.md)) and change their definitions.
+
 ## IAuthorizationService
 
 ASP.NET Core provides the `IAuthorizationService` that can be used to check for authorization. Once you inject, you can use it in your code to conditionally control the authorization.

docs/en/Customizing-Application-Modules-Guide.md

@@ -53,3 +53,10 @@ This section suggests some approaches if you decided to use pre-built applicatio
 * [Overriding Services](Customizing-Application-Modules-Overriding-Services.md)
 * [Overriding the User Interface](Customizing-Application-Modules-Overriding-User-Interface.md)
 
+### See Also
+
+Also, see the following documents:
+
+* See [the localization document](Localization.md) to learn how to extend existing localization resources.
+* See [the settings document](Settings.md) to learn how to change setting definitions of a depended module.
+* See [the authorization document](Authorization.md) to learn how to change permission definitions of a depended module.