how can we limit the number of people that can sign up for a field?

I have checked the most recent form that you're working on and see that you will use it for volunteer reservation, is that correct?

Upon checking your form I found out that would only want four volunteers to sign up for a specific show. With this requirement I suggest you try to use any of these following of our widgets.

https://widgets.jotform.com/widget/gift_registry

https://widgets.jotform.com/widget/ticket_purchases

https://widgets.jotform.com/widget/appointment_slots

https://widgets.jotform.com/widget/multiselect_grid

I hope this helps. Please feel free to let us know if you need any further assistance. Thank you.