What does "legend" refer to in terms of diagrams?

In terms of diagrams, "legend" typically refers to a key for symbols. The legend serves as an explanatory guide, helping users interpret the symbols and markings used throughout the diagram. This crucial element indicates what each symbol represents, ensuring clarity and understanding for anyone analyzing the diagram.

The legend provides context that enhances the viewer's comprehension of the information presented. By clearly defining the symbols and colors used, the legend allows for quick reference and helps prevent misinterpretation of the diagram's content.