Selecting the "Edit" button will display the edit user screen.
From this screen you can:
Set a user as active or inactive.
Change the users name.
Change the Group that the user belongs to.
Note that you cannot change a password for a user here.
If a user wants to change a password, and they know their password, they should log into the system, and use the "change password" menu option.
If a user has forgotten their password, an Administrator can use the Reset Password feature to reset the user's password.