For opening the profiles window, you must press the Edit user profiles that is inside the new users window, then press the Add button, a new window will appear asking you for the new profile data. For creating a new profile, you must at least provide the profile name, the default home directory, the default shell and the default maximum/minimum user/group ID.If you want to replace any part of the default home directory with the user name, you can use the $user keyword (i.e.: /home/$user).
