To zoom in on an area, drag a line upper left to lower right across the area. For more information on key strokes, drag a question mark, pattern with the middle button. A strokes window appears. This is layer 12. Leave the width at -1 for the default minimum wire width of 8 microns.
Width units are microns.
Click on Keep Optional Settings and OK . Use the left mouse button to draw wires. Click to start. Click to change direction. Double click to end a wire.