Add a new user
When you pressed add (author, chair, reviewer, publication editor, reviewer) a pop up appears with all users where you can search by Firstname, Lastname, Organization or Email address, sort them and add them as their respective role by pressing the button.
If the user is not in the database yet you can invite him by pressing Invite.
Invite new User
When you want to invite a new user a new dialog box appears, where you have to enter the new users data. The user will be created and notified with email that a new account was created for him. Further the user will be added as his respective role.