Event cross-promotion allows you to encourage attendees to buy tickets for your other events. These suggestions will appear during the booking process.
1. Events list - All your other events will appear in this list, simply tick the box to include it in the booking process.
2. Booking page - Your events will appear in a list during the booking process. Tickets purchased for another event will be added to the customers basket.
You have to enable event cross-promotion on all your events if you want it to show on every booking page.
Settings will not copied over to events that have been duplicate it.