# Backend customizing
Author | Björn Behrens (HerrB)
Created | 20th September 2006
Audience | Site Administrators
Applies to | Contenido 4.8.4 or later

## Introduction

Frontend customizing is a mechanism to customize various parameters of the frontend. There are not many settings you can do, as this mechanism is relatively new. However, this mechanism will be used more and more in the future.

## How it works

Customizing Contenido settings is very easy and can be done via the system or client customizing settings.
Important: User settings have precendence before group settings. User settings always override group settings. If the user is added to more than one group, the result is undefined. Make sure that your groups don't override each other.

## Common parameters

Area/Type | Property | Value (Description) | Applies to
login_error_page | idcatart | If specified, then a user who is logged out or tries to open a protected category if not logged in will get redirected to the page specified by idcatart. This setting overrides other login_error_page settings. | Clients, System
login_error_page | idcat | If specified, then a user who is logged out or tries to open a protected category if not logged in will get redirected to the category specified by idcat. You can specify idcat and/or idart (see next setting). | Clients, System
login_error_page | idart | If specified, then a user who is logged out or tries to open a protected category if not logged in will get redirected to the article specified by idart. You can specify idcat and/or idart (see previous setting). | System, Clients