WHY DO YOU BUILD FORM CHECKOUT?
Depend on your purpose to get customers information. We have support function that available to provide you text boxes, radio boxes, check book boxes, number boxes to choose.
HOW TO CREATE AND USE NEW FORM FOR CHECKOUT
Step 1- Click on Traveler setting > ST form builder. Then create a new form and named for the form.
Step 2- Add fields for form by check field after add form. Then setup to attribute for fields.
Step 3- Then, you save the form and choose form for checkout form
Please watch the following video for more detail