Once you have opened the Edit Contact page,
click Add Group and select the Group
from the list.
Don't see a group? Maybe you haven't added one yet.
To add a group:
If you click on Groups (and
you don't have any groups created yet), a pop-up will appear.
Next, create a
Type in the title of the group
Under "Add Contact" type in the email addresses you want to add to the group (separated by comma) and select Add. Once you are finished adding contacts, select Save. To create a new group from the Groups section, select the Add icon and follow the same steps as above for creating a new group.