To create a user group, go to Admin -> User Groups. Click Create at the bottom of the page.
General section appears, where you can specify Group Name, Group Description, and enter your Password.
Click Save when you are done.
You will be redirected to a Group List. Find your group and click its Action menu->Details.
You will see one more section User Management where users can be linked to your group.
To link users, click on the arrow in Link Users drop-down list, select checkboxes of preferred users and click Link.
As soon as users are linked, they will be displayed in Linked Users table.
You can unlink a user from a group anytime. To do this, click Unlink for a corresponding user -> Yes.
To manage an existing user group, click its Action menu -> Details.