It is possible to change the order of attributes within all Event Registration forms within NetCommunity. To do so, navigate to Config - Attributes within The Raiser's Edge, select a row to re-order, and click the Up or Down button. Once the attributes have been re-ordered within The Raiser's Edge, log into NetCommunity with administrative rights and click the "Refresh code tables" button in Administration > Code Tables.

This will re-order the participant attributes for all event registration forms.