The "Groups" → "General" page allows you to add and delete group members and also provides information on the group currently edited.
Use the "Group Name" text field to edit the name you have previously assigned to your group.
Check the box related to the "Publish this group's contact info in the public address book" to display the respective group in the "Domain Contacts" folder.
To add a group member type her / his email address in the "Group members" text field. To add more than one member click the "Add member" button which will generate additional text fields for email addresses. To delete an already added member use the "Delete" button. Check the "Enable this group" option if you want to render the group active.
The "Info" section displays details referring to the creation and last modification date and time of the group.
When you are done configuring these parameters, remember to click the "Save Configuration" button to preserve your changes.