Advanced: Contact form in one column

Select the "Form Settings" button from Control Panel. In Cells disposition, select "In one column" option for Cells Arrangement and the click the "Save" button.

The field will be rearranged in one column

Now we will reduce the width of the label cell and enlarge the width of the text box. In "Form Settings," select the Dimension tab and enter new dimension values:

This will be the result: