At times you will want to turn a hand-drafted drawing into an AutoCAD drawing file. You might be modifying a design you created before you started using AutoCAD or might be converting your entire library of drawings for future AutoCAD use. Or perhaps you want to convert a sketch into a formal drawing. This chapter discusses three ways to enter a hand-drafted drawing: tracing, scaling, and scanning. Each of these methods of drawing input has its advantages and disadvantages.