What type of notes relate to specific items on a drawing?

Key notes are specific references or symbols provided on a drawing that correspond to detailed information typically found in a legend or notes section. They serve to convey essential clarifications about particular elements or materials in the drawing without overcrowding the visual representation. This facilitates clear communication, as the viewer can understand which notes apply directly to which items or features in the design. Key notes are often numbered and linked to textual descriptions, enhancing the clarity and accessibility of the information. This systematic approach helps maintain organization and ensures that anyone reviewing the drawing can easily find the relevant details related to specific components.

In contrast, margin notes are typically located in the margins of documents and may not directly relate to specific drawing elements. Annotations can refer to a broader category of notes that include comments or explanations but are not necessarily linked to specific items. Commentary notes might provide general remarks or opinions, lacking the specificity and organization that key notes provide.