To create a new user, it is necessary to assign them to a user group. (you can find out how to create a new user here). You can also create user groups under the same menu item that you use to create a new user. The settings can be found under: Settings - User Management - User Rights Management.
On the right you will find the area "Create new user group". Enter the name of your new group here and specify whether it has a superordinate group. Click Save to save the settings.
After a new user group has been created, specific rights can be assigned for each individual user group (in this example: administrators). To do this, click on the editing pen 
and then scroll down to the "User Group Options - Administrators"
Now select the appropriate checkbox 
to assign certain rights.
