2, Mark the part of the drawing that you need to measure. You can use a pencil or light ink to mark these locations.
3, Holding the measuring tool, place it at the location to be measured and record the corresponding measurement.
4. Transfer the measurements to the drawing. You can use a straightener to draw a straight line, a compass to draw a circle, or an angle to draw an angle using the necessary angle.
5. If you need to connect different measurement points, use straight lines or curves to connect them and make sure they are to scale and accuracy.
6. Finally, you can use the eraser to remove any useless markings or incorrect lines to ensure that your drawing is clean, neat, and accurate.