Hi,

how can I change the color of the page background of the HTML-page? Not the form background, but the page background.

If you are using the code as it's created and not altering it or directly using the HTML page itself, then you would change that in your website's settings. That has nothing to do with the Form Builder itself. The Form Builder uses an iframe to display the forms, so it only displays the form on whatever page you put it on. The page settings would depend entirely on how your website is setup and what type of website it is etc. Nothing to do with the software for the form.

Using 'Manual Server Setup' creates a html page of the form and all exported files were uploaded to my server. I want to change the background of that page because a link on the website goes straight to the html-page and opens the form in a 'New Window'. So it has to do with the software for the form.