How do I center the form in my page?

Where can I change the settings for the form to be centered in the page.

I checked this form (https://www.jotform.ca/form/70716400553247) and I was able to replicate the issue. Please try to inject this custom CSS:

.form-all {
float: none !important;
}

Here's a guide on How-to-Inject-Custom-CSS-Codes. Here's the result:

Hope that helps. Thank you.