348
AutoCAD and Its Applications—Basics
Copyright Goodheart-Willcox Co., Inc.
PROFESSIONAL TIP PROFESSIONAL TIP
Objects often do not align conveniently for using crossing selection
to pick objects to stretch. Consider using a crossing lasso or crossing
polygon to make selection easier. If the stretch is not as expected, press
[Esc]
to cancel. The
STRETCH
command and other editing commands
work well with polar tracking or
Ortho
mode.
Exercise 11-7
Complete the exercise on the companion website.
www.g-wlearning.com/CAD
Using the LENGTHEN Command U s ing the LENGTHEN Comm a nd
Use the
LENGTHEN
command to change the length of a line, 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 iden-
tifi es the current length or included angle. The initial selection is for reference only.
Select an option and follow the prompts to complete the operation. Preview the opera-
tion 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 11-28. Use the
Angle
option of the
DElta
option to
change the included angle of an arc according to a specifi ed angle. See Figure 11-29.
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 11-30.
The
Total
option allows you to set the total length or angle of the object after the
LENGTHEN
operation. See Figure 11-31. The
DYnamic
option lets you drag the endpoint
of the object to the desired length or angle using the crosshairs. See Figure 11-32. 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
NEW

Figure 11-28.
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