How do I add a return to main page button?

Hey @epantaleon - Where do you plan to place this button? In the THANK YOU PAGE? If so, you can add text and hyperlinks inside the thank you message.

Just click SETTINGS at the top > THANK YOU PAGE on the left > type in your desired text inside the thank you message > highlight the text you wish to convert to a link > click the INSERT LINK button > type in the URL of your main page > then click OK.

Related guide: Setting-up-the-Thank-You-Page

Alternatively, you can also automate this process so your respondents won't have to click a link. You can automatically redirect them to any page you want after form submission.

Complete guide: Redirecting-Users-to-a-Different-Page