Assuming you're using Gnome, in GDM look for the Actions Menu, select Configure|Security and authorize "root" to log on there.
Nylex is right, tho. This is not a very good idea. The only time I use it is when I want to do housekeeping on directories in /usr that contain pictures I need to see before I delete them, or to check programs I'm having trouble executing as a regular user to make sure it's not a permissions issue, etc. Then as soon as I'm done I log out of root.
In some ways, it's even easier to make a major mess using root from graphical mode than from the command line.
Last edited by rickh; 10-05-2006 at 02:19 PM.