Navigate to your dashboard and click "Customize".
Click to edit the information that should be collected.
Click the checkbox next to each field you would like to include. When filling out the form, users will be required to provide information for every field checked (i.e. they are not optional).
Custom fields allow you to ask whatever questions you would like. It's important to note the following:
Instead of creating a new event, we recommend copying the previous event so it will retain it's settings, making it easy to carry over the information you would like to collect to a new event.