You can add members to a group using the “ADD MEMBER” button on the members tab of the group page. Clicking “ADD MEMBER” will open a modal screen indicating which groups will receive the new members.
Search for as many users as you like, selecting them one at a time to build a list of users then click “ADD MEMBERS" to confirm.
NB Adding users to a child group will automatically add them to the parent groups above it - these are indicated on screen. Learn more about group hierarchies and membership.
Users can be in as many groups as necessary.