Can we adjust the size of the page on the form?

Our webpage cannot accommodate the default size of the form width.

Is there a way to change the page width in the templates or default settings?

I have tested your form and it is not fully responsive. Because of that it is cut of on your webpage.

To resolve this issue, please add Mobile Responsive widget to your form. 

How to Add a Widget to your Form?

Hope this will help. Let us know if you need further assistance.