Notes on manufacturing drawings are written instructions or clarifications that supplement the graphical information, providing critical details that may not be covered by dimensions, symbols, or other annotations. These notes might include specific instructions on material properties, surface treatments, assembly instructions, or special manufacturing processes. They help prevent misunderstandings and ensure that all parties—designers, machinists, and quality control personnel—are aligned on requirements. For example, a note could specify the need for a particular heat treatment on a part to achieve desired hardness or state that a component must meet a specific standard. Including clear, concise notes enhances communication, reduces errors, and improves overall manufacturing efficiency.