Use the connectivity page to specify the conductor layers and their connections. On a conductor layer, all touching or overlapping shapes are connected. A connection is made between conductor layer when the shapes of the two conductor layers overlap. Optionally a via layer can be specified which must be present to make a connection between the two conductor layer.

To specify a conductor layer

By creating conductor layers with boolean expressions, it is possible for example to separate an active area layer of a CMOS transistor into source and drain regions by subtracting the gate poly. Symbolic layers are useful to use "speaking" names for layers instead of the numeric layer/datatype specification. Please note, that the net tracer is considerably slower when using boolean expressions.