Grouping guests together ensures that the each guest in the Group will be seated together automatically. Guests can be Grouped together from the full-screen view of Attendee Manager.
Select each attendee using the checkboxes to the left of their names
From the tabs at bottom of the screen, select Groups and then either Add New Group or add the selected guests to an existing Group.
The new Group will be assigned a number automatically...
...and when seating guests, the entire Group will be seated together automatically!