The rule for creating CAD drawings is that a computer drawing should be created using real-world units.

true size

Explanation:

The CAD drawing is an example of the details of the components of an engineering project. Uses CAD (Computer Aided Design) software to create drawings used throughout the design project, from conceptual design to construction or assembly.

You can control the size of the virtual drawing area in the model space by specifying the drawing boundary

Using the CAD drawing we can use the correct size of the specification project. The original unit can be used due to the sheet size.