2013

Table Of Contents
An expanded description of the linetype
A comment such as "Use this linetype for hidden lines"
If you omit the description, do not insert a comma after the linetype name.
A description cannot exceed 47 characters.
Alignment Field (A)
The alignment field specifies the action for pattern alignment at the ends of
individual lines, circles, and arcs. Currently, AutoCAD supports only A-type
alignment, which guarantees that the endpoints of lines and arcs start and
stop with a dash.
For example, suppose you create a linetype called CENTRAL that displays the
repeating dash-dot sequence commonly used as a centerline. AutoCAD adjusts
the dash-dot sequence on an individual line so that dashes and line endpoints
coincide. The pattern fits the line so that at least half of the first dash begins
and ends the line. If necessary, the first and last dashes are lengthened. If a
line is too short to hold even one dash-dot sequence, AutoCAD draws a
continuous line between the endpoints. For arcs also, the pattern is adjusted
so that dashes are drawn at the endpoints. Circles do not have endpoints, but
AutoCAD adjusts the dash-dot sequence to provide a reasonable display.
You must specify A-type alignment by entering a in the alignment field.
Pattern Descriptors
Each pattern descriptor field specifies the length of segments making up the
linetype, separated by commas (no spaces are allowed):
A positive decimal number denotes a pen-down (dash) segment of that
length.
A negative decimal number denotes a pen-up (space) segment of that
length.
A dash length of 0 draws a dot.
You can enter up to 12 dash-length specifications per linetype, provided they
fit on one 80-character line in the LIN file. You need to include only one
complete repetition of the linetype pattern defined by pattern descriptors.
When the linetype is drawn, AutoCAD uses the first pattern descriptor for the
starting and ending dashes. Between the starting and ending dashes, the
pattern dash specifications are drawn sequentially, beginning with the second
dash specification and restarting the pattern with the first dash specification
when required.
Simple Custom Linetypes | 19