The field order page in Designer allows the user to move the order of the fields. This field order determines the navigation from field to field in the naturalForms app.
To change this order, simply drag and drop the fields into the order you want. When you hover your cursor over a field, you will see a appear next to the field. Simply click and hold the field and move the field into the appropriate spot.
Radio buttons, checkboxes, and drawing fields (even though they are listed here) are not included in the navigation.
Once these changes are complete, remember to save your template.