Simple or RSVP Registration:
To set the event capacity for Simple or RSVP registration, go to your Event Dashboard > Setup > Registration > Setup and scroll to Event Capacity. Put in the maximum number of guests allowed, confirm your final day to register, and click Update Settings at the bottom of the section.
Ticketed or Multi-Event Registration:
To set the event capacity for Ticketed registration, go to your Event Dashboard > Setup > Registration > Tickets, then click on each ticket type and set the maximum number of tickets available for purchase, and click Save Now at the bottom of the section.
Set Capacity for Entire Event:
To set the capacity across your entire event, go to Registration>Advanced, then scroll down to: Max Ticket Sales and select Maximum Ticket Sales.
Max Tickets sales is when total orders is reached across all ticket types.
If you want to set quantity for each, please set: Use combined ticket capacity.
You can create a waitlist for your event by following these steps: https://support.eventcreate.com/en/articles/5948528-can-i-create-a-waitlist-for-my-event