Adding a link to login screen

Hello all,

I would like to add a link on the login window so that i can redirect users to my homepage once they logout.

Can anybody guide me to add a link with the text: " Back to main" positioned under the Login Button?.

I have tried to search the forum and i already know that i have to edit some php file but I have no idea which file and what to add, so if anybody has an idea I would really appreciate the effort.

Thanks anyway!

Q