Create Single-View Drawings (Model Space)
If you are going to create a two dimensional drawing that has one view, you can create the drawing and its annotation entirely in model space. This is the traditional method for creating drawings with AutoCAD..
The process of creating and plotting a drawing file in model space is very different from the process used in manual drafting.
If you draw and plot from model space, you must determine and apply a scale factor to annotate objects before you plot.