Chapter 11 Modifying Objects
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Copyright Goodheart-Willcox Co., Inc.
Using the LENGTHEN Command U s ing the LENGTHEN Comm a nd
Use the
LENGTHEN
command to change the length of a line, arc, polyline, spline, or
elliptical arc, or the included angle of an arc. You can only lengthen one object at a time.
You cannot lengthen a closed object because an unconnected endpoint does not exist.
Access the
LENGTHEN
command and select the object to change. AutoCAD identifi es
the current length. If the selected object is an arc, the length and included angle are iden-
tifi ed. The initial selection is for reference only. Select an option and follow the prompts
to complete the operation. Preview the operation before completing the command.
Use the
DElta
option to specify a positive or negative change in length, measured
from the endpoint of the selected object. The change in length occurs at the end closest
to the selection point. See Figure 11-26. Use the
Angle
option of the
DElta
option to
change the included angle of an arc according to a specifi ed angle. See Figure 11-27.
Select the
Percent
option to change the length of an object or the angle of an arc by
a specifi ed percentage. The original length is 100 percent. Specify a percentage more
than 100 to increase the length or less than 100 to decrease the length. See Figure 11-28.
The
Total
option allows you to set the total length or angle of the object after the
LENGTHEN
operation. See Figure 11-29. The
DYnamic
option lets you drag the endpoint
of the object to the desired length or angle using the crosshairs. See Figure 11-30. It is
helpful to use dynamic input with polar tracking or
Ortho
mode or to have the grid
and snap set to usable increments when using the
DYnamic
option.
LENGTHEN
Ribbon
Home
Modify
Lengthen
Type
LENGTHEN
LEN
Figure 11-26.
Using the
DElta
option of the
LENGTHEN
command with
values of
.75
and –.75.
Select the object
closest to the end to
lengthen or shorten
Original Object
Lengthened by a Value of
.75
Shortened by a Value of
–.75
.75
–.75
Figure 11-27.
Using the
Angle
option of the
DElta
option to increase
or decrease the
included angle of an
arc by 45°.
Original Arc
90° Included Angle
Select the object
closest to the end
to lengthen or shorten
Arc Length Changed
by 45°
Arc Length Changed
by –45°
45°
–45°