While the ColReorder insertion point indicator can be styled, another option to show the end user what the column will look like when the table has been reordered is to actually do the reordering while the mouse is still dragging the column header. This is shown in this example and is controlled by the bRealtime
parameter.
$(document).ready( function () { var oTable = $('#example').dataTable( { "sDom": 'Rlfrtip', "oColReorder": { "bRealtime": true } } ); } );