\label{Roles_Screen}
After logging into LON-CAPA with your username and password, you will
see a screen where you can select your ROLE. LON-CAPA is a roles-based
system. You can always use the same login even though your roles may
change. You can be an instructor in one class, a TA for another class,
and an author of resources -- all with the same username. Selecting 
\textbf{Roles}
on the Main Menu will bring you back to
the \textbf{Roles} screen. 

NOTE: If you only have one role, you will bypass this screen.