Use Tools - Metal when you wish to add metal to your circuit. You select what type of polygon(s) you wish to add from the Metal menu.
Insert - Metal - Draw Metal Rectangle
Insert - Metal - Draw Metal Polygon
The following entries make up the palette of standard geometries.
Insert - Metal - Parallel Lines
Insert - Metal - Circle/Ellipse
Insert - Metal - Rectangular Spiral
Insert - Metal - N-sided Spiral
Tool Bar Button: Click on the to open this menu in the Insert tool bar.