log in through root

[Rajanish Kumar]

Hi!
 I have already installed Fedora 12 .I have given root password...and
finally added a user name "rajanish"
.I am log in through "rajanish"but i have not accessing throgh root...I want
to log in through root because i want to learn administrative property.
 please help me to guide log in through root..

Rajanish Kumar
Fedora User