how to set scale by reference in AutoCAD

To set scale by reference in AutoCAD, follow these steps: Start a drawing or open an existing one. Select the "View" tab from the ribbon. on "Scale" in the "Viewports" panel. Select the "Reference Scale" option. Set the "Reference Scale" by specifying the length of a known object in the drawing and the actual length of that object. OK to apply the scale and adjust the view of the drawing accordingly. By using the reference scale, you can ensure that the dimensions in your AutoCAD drawing are accurate and to scale.