Simple Linetype Definition

The AutoCAD linetype syntax is pretty simple. Referring back to Part 1, recall the linetype definition that I copied, edited, and named MY-DASHED.

acad.lin file
Looking at the definition, the first item is an asterisk, followed by the name of the linetype, then a short description, and finally an ASCII representation of the linetype. This last part is totally up to you, just get it as close as you can. Look at some of the other linetypes as a reference. Read more about AutoCAD Linetypes - Part 2

So where do AutoCAD linetypes come from? When you start up AutoCAD and start drawing some geometry and decide to change the linetype to something other than Continuous, where did they come from? How did they get there? How can you change them or add more?

To start with, there are two types of linetypes, simple and complex; both are stored in the DWG file. Simple linetypes are composed of line segments and spaces (or gaps) only. Examples include the HIDDEN, DASHDOT, and PHANTOM linetypes, as shown below. Simple linetypes are fully contained in the DWG file. If you send a DWG file to someone else, you do not have to send any external files along also in order for the simple linetypes to display correctly.
example of simple linetypes Read more about AutoCAD Linetypes - Part 1

The AutoCAD Product Design and Usability Group wants your feedback and input on making and using linetypes in AutoCAD.

I know there are people out there with linetype wishes, because I see them on the AUGI wish list... Maybe you would like an easy way to make a linetype like this (yes, this is a real AutoCAD linetype)
braid AutoCAD linetype

Follow this link to take the survey:

I have seen a few people recently inquire about "exploding linetypes"...

If you have a non-continuous linetype and you want to "explode" it into its component parts, you can do this by using WMFOUT and WMFIN. Read more about Explode linetypes

In AutoCAD, you can assign a non-continuous linetype to a 3D polyline, but it will not display or plot.

If you need 3D polylines, and you need a non-continuous linetype, for example to represent the flowline of a ditch - there are a couple of workarounds. Both assume that you have assigned the correct linetype to your 3D polylines.

    If you have ever tried making a custom linetype with inch symbol (") in the linetype definition, you know AutoCAD will complain, because it interprets this as an extra quote mark in the linetype string. Instead, use %%34 to represent the inch mark ("). See the following example:

    *15 Inch,-----15"-----15"-----15"-----15"-----15"-----

    Note: The 34 is the ASCII code for (") Read more about Inch mark in linetypes


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