Open your tree in Family Tree Builder. To add a fact to someone in your family tree click the ‘Edit’ button on that person’s card. Then click ‘Edit details: [NAME]‘ and go to the ‘Facts’ tab.
Click “New Fact”. Select the fact category on the left and then the fact type from the list on the right. Click ‘OK’ when you found the fact type you’d like to add. Then add details about the fact and click ‘OK’ again to save.