Reorder column in requisition line region

Hello,

do we have good document explain the personalization required to reorder column?  In requisition line under source tab, wanted to rearrange Document Type, Document and line before note to buyer.  Currently users are not moving right and entering the agreement info, Instead they are entering on note to buyer.  Our purchases are category based and no ASL setup because we set CPA for lot of activities hence users has to select the CPA for the services.  We educate users to look for source document field and choose however couple of users keep entering on note to buyer.  Hence we plan