The single-page form is great, however, for longer forms, it’s best to create multi-page forms. Divide your forms into sections and this way users will not be intimidated by endless forms.
In certain situations, you need to remove an extra page.
First, navigate to your Form Editor. In the main view, go right in between two pages with your mouse cursor. While hovering in that area, a Merge pages button will appear. Click the button and the pages are now combined.
If you combine them by mistake, add a new page break field in the same place.