create new group in Aris database

Hello,

I had a question about creating groups in database of Aris Business Architect. Whenever we add a new database in a server,a group called 'Main Group' is created by default in it. So the hierarchy remains like:

Database

        Main Folder

                (contents inside main folder)

But what if I want a hierarchy like this:

Database

       Main Folder

                (contents inside main folder)

       Main Folder1

                (contents inside main folder1)

       Main Folder2 

               (contents inside main folder2)

Since I didnt find any option such as New--->group when you right click a database,I am really confused how to do this. I will be really grateful if you help me.

Thank you,

Anaya