How to create sub-groups
Want to create a smaller group of Members from within the same group? Use sub-groups.
Login, click the group that contains the Members, click Members:
Hover over the Members you want to add to the sub-group, and tick the box:
Click Create subgroup:
Add the sub-group name (1), email address (2), and choose how to relate the sub-group to your other groups (3), and tick to send a welcome message (4):