To rearrange or reorder the fields on a webform, navigate to Online > Webforms > Search & Manage
Under the layout tab, all webforms will be displayed
Click on the section that you want to reorder the webforms
The order that the fields appear is the order they will appear on the forms as well. Hover over the three dots to the left of the field and choose to move it up (Up) or down (Dn).
By selecting the up button, the field will now be placed higher by one position.
By selecting the Dn button, the field will now be placed lower by one position.