Why might a schematic diagram be divided into local areas?

Dividing a schematic diagram into local areas serves the purpose of making circuits easier to understand. By organizing the components and connections into smaller, manageable sections, it allows anyone reviewing the schematic to focus on one area at a time without being overwhelmed by the complexity of the entire circuit. This segmentation is particularly beneficial in large and intricate designs, where different functionalities can be compartmentalized for clarity.

The local areas might represent different functional blocks, making it simpler to analyze each part independently before considering the whole system. This organization helps reinforce the understanding of relationships and interactions within various parts of the circuit, ultimately leading to a clearer overall view of how the entire system operates.

Other choices do not align with the primary aim of schematic design. For example, making circuits harder to understand goes against the foundational purpose of schematics. Hiding complex components can lead to confusion rather than clarity, and while reducing the number of symbols might simplify a diagram, it does not necessarily aid in understanding the arrangement and function of the circuit.