Chapter 11 Modifying Objects
317
Copyright Goodheart-Willcox Co., Inc.
NOTE NOTE
To access the
EXTEND
command while using the
TRIM
command, after selecting the
cutting edge(s), hold down
[Shift]
and pick objects to extend to the cutting edge. The
EXTEND
command is described later in this chapter.
Trimming without Selecting a Cutting Edge
To trim objects to the nearest intersection without selecting a cutting edge, access
the
TRIM
command. At the
Select objects or select all:
prompt, press
[Enter]
instead
of picking a cutting edge. Then pick the objects to trim. You can continue selecting
objects to trim without restarting the
TRIM
command. To exit, press [Enter].
Trimming to an Implied Intersection
Use the
Edge
option of the
TRIM
command to trim to an implied intersection. The
No extend
mode is active by default, and does not allow you to trim objects that do not
intersect. To trim nonintersecting objects, access the
TRIM
command, pick the cutting
edges, and select the
Edge
option followed by the
Extend
option. AutoCAD now recog-
nizes implied intersections and allows you to pick objects to trim. See Figure 11-19.
Adjusting the
Edge
mode does not change the selected cutting edges.
NOTE NOTE
Use the
eRase
option of the
TRIM
command to erase unwanted objects, usually objects
that cannot be trimmed. Use the
Undo
option to restore previously trimmed objects
without leaving the command. You must activate the
Undo
option immediately after
performing an unwanted trim. The
Project
option applies to trimming 3D objects, as
explained in AutoCAD and Its Applications—Advanced.
Extending Extending
Use the
EXTEND
command to extend lines, elliptical arcs, rays, open polylines, arcs, and
splines to meet other objects. You cannot extend a closed object because an unconnected
endpoint does not exist. Access the
EXTEND
command, pick as many boundary edges as
necessary, and then press [Enter]. Now pick the objects to extend to the boundary edges.
Preview the operation before extending. To exit, press [Enter]. See Figure 11-20.
Automatic windowing is a quick and effective method for extending multiple
objects. The
EXTEND
command also offers
Crossing
and
Fence
options that provide
standard crossing and fence selection. Figure 11-21 shows using the
Crossing
option
to extend multiple objects. Figure 11-22 shows an example of using the
Fence
option
to extend multiple objects.
EXTEND
Ribbon
Home
Modify
Extend
Type
EXTEND
EX
boundary edge:
The edge to which
objects such as
lines, arcs, and
polylines extend.
Figure 11-19.
Trimming to an
implied intersection
with the
Extend
mode of the
Edge
option active.
Pick the
cutting edge
Imaginary
extension
of the line
Object trimmed
at this point
Pick object
to trim
Step 1 Step 2 Result