A linetype is a repeating pattern of dashes, dots, and blank spaces displayed in a line or a curve. You assign linetypes to objects either by layer or by specifying the linetype explicitly, independent of layers.
In addition to choosing a linetype, you can set its scale to control the size of the dashes and spaces, and you can create your own custom linetypes.
The linetypes used internally by AutoCAD LT should not be confused with the hardware linetypes provided by some plotters. The two types of dashed lines produce similar results. Do not use both types at the same time, however, because the results can be unpredictable.
Loading Linetypes
Setting the Current Linetype
Changing the Linetype of an Object
Controlling Linetype Scale
Displaying Linetypes on Short Segments and Polylines
Customizing Linetypes