There are no configuration options for form previews.

Forms use exactly the same markup as a Typoscript FORM. Thus, you can alter the presentation of forms by changing the CSS stylesheet. Most HTML elements are styled with CSS classes, like csc-mailform, csc-form-labelcell, etc. In addition to this extension, you may wish to install one or more of the extensions julle_formpreview and julle_form2csv. If you do, it is important to install the extensions in the following order:

For instance, if you install the first and the third, and later wish to install the second, you should uninstall everything and reinstall the extensions in the appropriate order.