How do I change the Form Layout?

how do I turn off the form where the questions go on multiple pages?  I want everything on the single page as before

You can change the Form Layout in the Form Settings page. Here's a screen animation guide:

You can also disable it in the Account Settings page of your JotForm account. To do that, please log in to your account and open this link: https://www.jotform.com/myaccount/settings