How do I choose the default loss of new polygons?

 Geometry Elements- Metal Types

You choose the default loss of new metal polygons by selecting a default metal type. To do this, perform the following:

1.   Select Circuit => Metal Types from the project editor main menu.

2.   In the Metal Types dialog box which appears, select a metal type from the Metal for New Polygons drop list in the upper right hand corner of the dialog box. Whichever metal you select becomes the metal type for any new polygons added to the circuit.

3.   Click on the OK button to close the dialog box.