In this hour, you learned that you can override the admin templates. Overriding the admin templates allows you to customize the look and feel of the admin interface with your own code.
If you override templates at the site level, the customization affects views at the site, application, and object level. You can narrow down the customization to an application and object level so that only certain applications or object views are affected.
We also covered creating your own custom admin views and overriding them by using your own URL patterns.