AutoCAD 2004 Customization Tutorial: Simple Linetypes
June 17, 2003
Simple linetypes are those that consist of
dashes, spaces and dots. On the other hand complex linetypes may
contain texts and/or shapes. Figure 1 shows some simple and
complex linetypes. Here you learn how to define and use a simple
Figure 1 - Click on image to
Note: Linetypes are defined within text files that hold
the LIN extension. There are two default LIN files "acad.lin"
and "acadiso.lin". You may add the linetype definition to one of
these files or create your own LIN file. The latter is safer as
you are not changing the contents of existing files.
Note: If you are using an earlier release of AutoCAD
Open the file in AutoCAD.
command line type Notepad and then press Enter twice. The
Notepad window appears.
Notepad window type the proper text [Figure 2].
The first line is called the linetype header.
The header starts with an asterisk (*). The asterisk is
followed by the linetype name. You may add a comma followed by
some descriptive text about the linetype. Here some dashes and
dots are used to describe the linetype.
"A" is the alignment character. It always
appears in the beginning of the definition line.
Positive numbers stand for dashes. Thus .75
means a dash that is 0.75 units long.
Negative numbers stand for spaces. Thus -.25
means a blank space that is 0.25 units long.
Zeros stand for dots.
You need to define one segment of the linetype
Save the file as "simple_lt.lin".
AutoCAD command line, type LT and then press Enter. The
Linetype Manager dialog box appears [Figure 3].
Figure 3 - Click on image to
Click Load. The Load or Reload Linetypes dialog
box appears [Figure 4].
Select Linetype File dialog box locate and then open "simple_lt.lin"
Figure 5 - Click on image to
The 3DASHDOT linetype will be added to the Load or
Reload Linetype dialog box [Figure 6].
Select the linetype in the list and then click OK. The linetype
will be loaded [Figure 7].
Figure 7 - Click on image to
Select the objects on drawing environment.
From the Linetype Control drop down list select 3DASHDOT
Press Esc to deselect objects. The objects linetype is altered
to 3DASHDOT [Figure 9].
Figure 9 - Click on image to
About the Author
Alireza Parsai is the founder of cadpanel.com. He is a
mechanical engineer with more than 12 years experience with
AutoCAD. Alireza is an Autodesk Authorized Author, the AutoCAD
consultant for Al Khawarizmi Institute, a contributing editor
for Augiworld magazine, a writer for CAD Digest, an instructor
for AUGI Training Program, and an elected speaker for Autodesk
University 2002. He has written 7 books in Farsi, 3 booklets in
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