Printed circuit boards are widely used and replace hand-wiring methods.

When arranging symbols, it is typically not necessary to leave blank spaces adjacent to symbols to allow for reference designations and notes.

Interrupted paths are not an acceptable method of simplifying a diagram.

Terminals or leads are frequently identified by colors or symbols, which should be indicated on the diagram.

Connecting lines for conductors are typically drawn horizontally or vertically to minimize bends and crossovers.