It’s easy to create a new group using the contacts already in your Contacts.
Simply go to Contacts on the left hand side and go to the Groups Tab. Hit ‘Add Group’ on the top left.
Give your group a name and hit save.
Now go to ‘All’, and select the contacts that you would like to add by clicking on the box in the left hand column. You can filter your contacts by clicking on ‘Filter’ in the top right.
Once you have chosen all your contacts, click on ‘Add to Group’ at the top of the contact list, select the group you would like to add them to and hit ‘Add Contacts’.