how do i limit the number of sign up to my event?

I have an event that has 4 different categories. Each category has only 10 slots available, how do I prevent over subscription? 

Hello,

You can use on of our widgets:

Inventory Widget:

Example Form: https://form.jotform.com/61471146729964

Gift Registry Widget:

Example Form: http://form.jotformpro.com/form/51301543278955

Quantity Gift Registry Widget:

Example Form: https://form.jotform.com/70522762946966

The widget will count the quantities that you defined on its properties:

I hope this answer helps. Please don't hesitate to contact us for your further queries.

All the best!