How to use Extra products in Seated ticketing?

In Seated Ticketing it is possible to add extra products in the second step of the ticketshop. For example when you want to sell Parking tickets or Merchandise. But how does it work?

Via Settings – Order – Additional products, you can easily set up an upsell for your sale. Through +Add product type, you can add the product and quantity.

Via the SALES tab at the top, you can also sell the product directly from the dashboard.

If you don't set anything up in the sales plan, it will be immediately visible online. The product is shown in the last step.

Recommended image is square and 800x800 (it scales too).