Managing backend users is best done using the SYSTEM > Backend users module.
The module makes it possible to search and filter users. They can also be edited, deleted or disabled.
As you can see in the list, the Introduction Package is shipped with two users on top of the admin users created during the installation process. Let's take a look at what these other users can do.
The simplest way to check out another user (when one is an administrator) is to use the "simulate user" feature:
And here is what "simple_editor" sees when accessing the TYPO3 CMS backend:
As you can see, this user only has access to the "Page" module. Furthermore its view of the page tree is also limited to the branch starting with the "Content examples" page.
To switch back to the admin account, click on the user's name in the top bar and click the "Exit" button (note that this button normally reads "Logout").
Now try doing the same with the "advanced_editor". You should see the following after switching user:
The "advanced_editor" is allowed to use more modules than "simple_editor" but doesn't have any access to the page tree. This is probably a bug of the Introduction Package, but it makes for a good exercise for changing user rights in the next chapters.
User records can also be accessed using the WEB > List module and clicking on the root node (the one with the TYPO3 CMS logo).