You can customize the checkout page in this section:


Once an attendee clicks on the Checkout button in the Cart page, he will be redirected to the checkout page. To prevent that the tickets quantity is surpassed in some cases, tickets are reserved before attendees pay their order depending on the number of tickets they choose for every event in their cart. The timeleft setting specifies how long these ticket reservations are taken into account before they expire.
If an attendee stays on the Checkout for a period longer than the one you specified, the order is automatically deleted and the tickets are instantly released

Show tickets left count on cart modal