Final answer:
The meaning of the various symbols in a drawing is included in the Legend or key, which provides explanations and symbols to help interpret the information in the drawing.
Step-by-step explanation:
When reading a drawing, the meaning of the various symbols is included in the Legend. The legend, also known as a key, is a part of the drawing that provides explanations and symbols to help interpret the information represented in the drawing. It identifies and describes the symbols used in the drawing, making it easier to understand and interpret the information conveyed by the drawing.