Layers are a way of managing, tidying and also controlling the visual layout of a drawing. A whole section of a drawing can be turned on or off, or simply one aspect can be controlled - text for example. This is all done by using layers within Autocad. The concept of layers is used in other software applications, such as Paintshop programs. For those not aware of the concept, we'll start from the beginning: When a new Autocad drawing is created, everything which is drawn is drawn on the one default layer, named 0. When creating drawings, the layer 0 shouldn't really be used. New layers should be set up with names corresponding to the content contained on them.