To add the multi-page feature to your form, look under Other Fields options in your Form Editor and select the field Page Break. Two new elements will be added to your form: the page break element and the pagination progress bar.
To add new page breaks, duplicate the one that was added or drag new ones from the Add Field panel. Each horizontal line is the beginning of a new page in your form.
To customize the multi-page form feature, click on each oh the pages you have created and the Edit Field panel will open on the left side of the page.
Once there, you can create a Page Title for each page created. From the options available in the Layout dropdown list you can select how you want the pages to be displayed: Hidden means that no progress bar will be shown, although the form will have multiple pages. The other three options are Steps (1, 2, 3 displayed as basic text), Percentage (25%, 50%, 75%) and Pages (1/4, 2/4, 3/4).
The result is the following: when users access your multi-page form, they will see the first section/page and the button Next at the bottom, that will take them forward. The navigation can also be done towards previous pages, using the link Previous.