The Form Editor is the section where you build your form. On the left, you’ll see a panel where all the form fields are listed into two categories: Basic and Advanced fields. The Form Layout menu is on top. You may use this menu to apply different changes to the form, such as the character encoding, width and text direction (if you want to use Hebrew, for example).
To edit a field, select it and use the panel on the left. Different field types have different options.
You may return to the Form Editor whenever you want to adjust the structure of your online form.