The new REVERSE command, available in the AutoCAD 2009 Subscription Bonus Pack 1, is a simple command to reverse the direction of lines, polylines, splines, and helixes. Launch the REVERSE command from the command line or using the Reverse button on the Subscription: Modify ribbon tab or toolbar and then select the object(s) to reverse. The ability to change the direction of these objects provides you with more control such as the display of special linetypes.
In addition to the new REVERSE command, the PEDIT command has been updated to include a new Reverse option. Simply select the polyline you want to edit and choose the Reverse option. The results are the same as using the REVERSE command.