Though of course customize the front end is most important, one feels perhaps even the desire, Also the back end to their own needs accordingly. For example, display a logo or to clean up the footer area / complement.
That can happen on the appropriate layout files as for the frontend. This play area for the header in the data
skin/adminhtml/…
a role and for links in the footer area of the data in the
Footer.phtml (Without “Help us ...” and “Magento Community” etc.) in /app/design/adminhtml/default/default/template/page
Here you can also work fine with Firebug.
Used in 1.4.1.1