UI Customization Guide - ABP Tag Helpers explained.

Explaining how to perform the necessary imports to use ABP Tag Helpers in UI Customization Guide.

docs/en/UI/AspNetCore/Customization-User-Interface.md

@@ -63,6 +63,8 @@ The account module defines a `Login.cshtml` file under the `Pages/Account` folde
 
 You typically want to copy the original `.cshtml` file of the module, then make the necessary changes. You can find the original file [here](https://github.com/abpframework/abp/blob/dev/modules/account/src/Volo.Abp.Account.Web/Pages/Account/Login.cshtml). Do not copy the `Login.cshtml.cs` file which is the code behind file for the razor page and we don't want to override it yet (see the next section).
 
+If the page you want to override contains [ABP Tag Helpers](../Tag-Helpers/Index.md), don't forget to add ViewImports lines from [here](https://github.com/abpframework/abp/blob/dev/modules/account/src/Volo.Abp.Account.Web/Pages/Account/_ViewImports.cshtml) to your ViewImports.
+
 That's all, you can change the file content however you like.
 
 ### Completely Overriding a Razor Page