There are numerous parts to the survey builder, with different capabilities and styling attributes.
Use the style tab on the survey subsection level to style the survey page. From here you can edit the text color, background and ability to add a background box.
By default all questions are stacked, navigate to the settings tab to have the questions shown individually.
Additional settings are available to determine other design attributes. Use the Survey Settings button on the navigation panel.
Watch the below video for more detail