You just need to have the co-ordinates,the application will do the rest.Save your co-ordinates in a text file and simply load them to see the polygon/polyline.
To Use this Feature
1.Click the polygon icon on the toolbar.
You can follow same steps for a Polyline.
2.Go to Plotting->Load polygon from a file...
3.Select the TXT file which has your co-ordinates.
4.You are done loading your polygon.