Backend users module 

The Administration > Users module offers a convenient way of working with backend users and groups. It provides a list of both users and groups. The users list can be searched and filtered.

Comparing Users or Groups 

The Backend users module offers the possibility to compare users. Just add users using the "+ Compare" button and then hit the "Compare user list" button. For example, this is the comparison of the three different editors provided by the Introduction Package:

The same functionality is available for user groups, including a comparison of their inherited permissions.

Impersonating Users ("Switch to") 

We can impersonate (switch) to a user by clicking the Switch to user action icon:

You will then be logged in as that user (note how the user name is prefixed with "SU" for "Simulated User"). To "switch back", use the "Exit" button (which replaces the usual "Logout" button).