Can I change a form's layout after the form has been created?

I made some forms while my overall settings had the form layout set to "Single Question on Each Page" rather than "All Questions on One Page". I want my forms to have All the Questions on one page. Can I change this retrospectively on the forms I have already cloned or created?

Yes, you can change your form layout from your form settings.

Go to Settings->Form Settings->Show More Options

Scroll down to the option called "Form Layout" and you can change it from here.

Hope this will work for you.

If you have any further query, please let us know.