To add guests just click on the box “Do you want to add guests?”, a curtain will open where you can enter other members of the group.
N.B. If the main guest is “group leader” you will have to choose “group member” for the new guest, so if you have chosen “family head” as the main guest, the other guests will be “family member”
To add other guests, just click on “add guest” and a new curtain will appear.