\label{Course_Change_Privileges}
To add a user to a course or to modify a user's privileges, do the following: (Note: if creation of new users is not permitted in your domain, you will only be able to add a user with an existing account in the LON-CAPA system). As an author (role selected), you can use this same mechanism to grant users co-author access to your authoring space.

\begin{enumerate}

\item Click "Manage course users" (\includegraphics[width=0.03\paperwidth]{cprv} or \textbf{CUSR}) in the \textbf{Main Menu} page.
\item Click the \underbar{Add/Modify a Course User} link.
\item You can use the \textbf{User Search} section to search for a user by username, or last name, in a specific LON-CAPA domain, or in an institutional directory, if the domain has access to an institutional directory search service.  You can also click the \textbf{Select User} link and a window will open with a list of all the users in the course.  

\textbf{Note}: If you know the exact username, you can either use a ``username is ...'' search in the search section, or  type the username in the textbox in the \textbf{Create a new user} section.

\item Click the  \textbf{Search} or \textbf{Create User} button, as appropriate.

\textbf{Note}: If the user exists, the \textbf{Modify existing user} screen will display the user's information, existing roles and roles you can assign. Which fields appear as textboxes in the \textbf{Personal Data} table, and may be modified, will depend on policies set for the domain.

\textbf{Note}: If this will be a new user, the \textbf{Create New User} screen will display fields to type in the user's nformation, and roles you can assign.

\item Click the box next to the roles you wish to revoke, or add to the user. If 
you are adding roles, a section can be assigned (not required) by choosing from existing sections or typing a new one. You can also provide starting and ending dates for the role.
\item Click \textbf{Modify user}.

\end{enumerate}