Part 4 - Getting Started - User Settings

The Joomla User menu is where you can add/edit user settings, add users to groups to determine what items they are allowed to edit, set up the user access levels to control which users can see which pages within your site, and some documentation capabilities with the use of notes. 
usrmgr

User manager: 
The User Manager area is where individual user accounts are managed.  This is where you add new users, change passwords, and define which website areas the user is allowed to access or edit.

usermgr1

How do I add a user? 
The quickest way to add a user is to have the user register an account at https://www.uab.edu/yourdomainname/login/register Once registered, all you have to do is activate the user account, set the JCE Editor as a default, and add the user to a group for permissions to edit items.

You can also manually add users by clicking on the "New" icon.
newusr

There are a couple of selections that are necessary to properly configure the user account.  The Login Name must equal the person's BlazerId.  No not enter a password.  Under Assigned User Groups, specify what type of a group the user belongs to.  The default of "registered" does not allow the user to edit the website.  Under Basic Settings>Editor, choose Editor - JCE from the dropdown list.  Failure to select the JCE Editor will not show any toolbars to allow a user to edit items. 
usertweaks 

How to Edit a an Existing User

In order to change an individual's user settings, log into the administrator area of your site, go to the "User" menu, and click on User Manager. Next, locate the user that you wish to update.
editusr
TIP: If you have a very large list of users, you may choose to type each person's username or name into the "Filter" text box to locate them.
user_edit
Once you have located the user, click on their name to access their account. In the "Assigned User Groups" area, indicate which group you wish to grant them access to. Next, decide if the user should "Receive System E-mails" — that is, e-mails generated by Joomla. Usually these are sent only to administrators, but you can grant anyone access to them.

To reset a password, just type a new one into password field, then retype it to confirm the new password.

TIP: An explanation of the groups can be found below.

While you have this user’s account open, you may choose the type of front-end editor they will be using.  We recommend the JCE Editor.  You may also choose what kind of help site they can access and their time zone. Now click Save to have the settings for that user preserved.

What are the Groups?
Group settings vary from website to website, so we are going to narrow this to the standard settings initially assigned to all UAB websites:
groups
Public:  This is sort of the "default account."  It really has no edit permissions set for anything, and really all a "public" user account would be able to do is simply look at the website from the front-end.  From there, we begin adding levels of permissions.
Registered: users can see content that non-registered users cannot, but they do not have the ability to edit anything.
Author: users can create articles and edit the ones they created, but do not have the ability to edit anything else, including articles by other authors.
Editors: are virtually the same as authors, but they can edit all author articles, not just their own.
Publishers: are the same as editors, but they can also determine whether articles can be published, unpublished, or deleted.
Manager:  A manager is able to manage groups below them and and login the back end.
Administrator:  Admins are able to manage groups and all back-end resources. There are also three different levels of back-end settings: manager, administrator, and super administrator. These levels have varying degrees of access to back-end tools with manager being the lowest level of access and super administrator having complete access to all site tools in most sites.

http://docs.joomla.org/Access_Control_List/1.6-2.5/Tutorial