High conversion is key to a successful event shop. Showing a promo code / discount / coupon code field on the shop is a known conversion killer. Customers will google on a promo code for your event, or call you to get a better deal. Paydro has a solution for this.
All promocodes have a unique link. This makes it very easy to use promo codes in emails or track referring sites. Your customers click the link and they'll see the hidden tickets or custom prices. It also allows you to hide the promo code field, optimizing your conversion.
You can also extend the promo code links with Google Analytics campaign tracking information.
From the event overview page find and click your event.
From the main menu click ticket shop and go to `Promocodes`.
At the Show promocode field section, set the slider Hide