Rearrange and Move Columns

dt << Reorder By Name;           // alphanumeric order

dt << Reverse Order;             // reverse current order

dt << Reorder By Data Type;      // row state, character, and then numeric

dt << Reorder By Modeling Type;  // continuous, ordinal, nominal

dt << Original Order;            // saved order

dt << Move Selected Column( to first );

dt << Move Selected Column( to last );

dt << Move Selected Column( after( "name" ) );

Note that Move Selected Column is an alias for Move Selected Columns.

dt << Move Selected Columns( {"name"}, to first );

dt << Move Selected Columns( {"name"}, to last );

dt << Move Selected Columns( {"name"}, after( "name" ) );