A method includes sorting a plurality of line objects in an electronics schematics file into predetermined categories that include horizontal lines, vertical lines, diagonal lines, and connector pins, among others. The processor determines a first association of a first line object of the plurality of line objects that is associated with a first pin object. The first the association indicates that the first line object and the plurality of line objects are part of a single line, and the first pin object is part of the single line. The processor determines a second association of a circuit start point that is associated with the first pin object, and forms a first circuit line group including the first association, the second association, and the circuit end point of the single line. The processor generates an electronics schematic output file that presents the first circuit line group with user-selectable single line tracing.