Navigate to registrations.
Find the person you are moving. Click Manage
This opens their registration file.
Click join or create team
If it is a new team please enter the team name. If you are joining them with an existing team you will find the team in the drop-down menu
If you do not see the field "join a team" (or family) then there are no existing groups in the event yet.
The individuals fundraising page will be deleted and they will now join the group fundraising page. Note that if they shared their original page the link will no longer exist. Their new link to share is the team page URL.