Yes – use Add someone's household... and theirs grows beside yours. For example, show your brother's household, then add your sister Kate's, and the two homes sit side by side so you can see how the cousins line up. Add as many as you like. Each household folds away again with its round ×, and nothing you do here changes the tree.
Where to find it
Household bar → the box
On a phone: if the menu is tucked away, press ☰ Menu (top left) first.
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