How can I add new fields to my form?

The forms contain various fields like input text, select box, check box, etc which are the basic elements of any form.
Click on "Add New Form". In the Design column, there is a drop down list of "Add fields to your form". Select any fields which you want to add into your form and they will be added accordingly. You can also change the sequence of forms if needed by dragging the fields up / down.