Basic Editing Commands
Sacramento City College
EDT 310
EDT 310 - Basic Editing Commands
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Objectives
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Objectives-Learn to Use
Command Alias
 Move
 Copy
 Break
 Rotate
 Extend
 Lengthen
 Chamfer
 Fillet
 Stretch

 Scale
 Arrays
 Rectangular
Positive
 Negative

 Polar
Non rotated
 Rotated

 Offset
 Dtext
 Trim
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“Modify” Commands Location
 Toolbar
 “Modify”
 Pull-down
Menu
 “Modify”
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“Modify” Commands Location
 Pull-down
Menu
 “Modify”
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The MOVE Command
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The MOVE Command

Use MOVE to change the location of objects.
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The MOVE Command
 Access the
MOVE command by:
 Command
Alias: M
 or
 Toolbar:
Modify
 or
 Pull-down
menu: Modify
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The MOVE Command Sequence
 Sequence
of command:
 MOVE
 Select
objects: 1 found
 Select objects:
 Specify base point or displacement:
 Specify second point of displacement or <use first point
as displacement>:
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The MOVE Command
 Select
all objects desired to be moved.
 Select the basepoint with the mouse and left
mouse button.
 Think
of the basepoint as the “handle”.
 Select
the second point of displacement with the
mouse and left mouse button.
 The
object will move after selection of the
second point of displacement.
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The MOVE Command
 Don’t
forget to terminate your selection with
the [Enter] key !
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COPY Command
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The COPY Command

Use COPY to make one or more copies of an
existing drawing object.
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The COPY Command
 Access the
COPY command by:
 Command Alias: CO
 or
 Toolbar:
Modify
 or
 Pull-down
menu: Modify
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The COPY Command
 Select
all objects desired to be copied
 Select the basepoint with the mouse and left
mouse button.
 Think
of the basepoint as the “handle”
 Select
the second point of displacement with the
mouse and left mouse button.
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The COPY Command
 The
object will copy after selection of the second
point of displacement.
 Don’t
forget to terminate your selection with the
[Enter] key!
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The COPY Command Sequence
 Command
Sequence:
 Command:
COPY
 Select objects: 1 found
 Select objects:
 use
Enter to stop selecting objects (!)
 Specify
base point or displacement, or [Multiple]:
 Specify second point of displacement or <use first
point as displacement>:
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The MIRROR Command
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The MIRROR Command
 Objects can
 You
be mirrored with this command.
mirror objects by
 first
selecting them and
 then selecting a line about which to mirror them.
 The
“mirror line” is a hinge about which the
objects are mirrored or reflected.
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The MIRROR Command
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The MIRROR Command
 Access the
MIRROR command by:
 Command
Alias: MI
 or
 Toolbar:
Modify
 or
 Pull-down
menu: Modify
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The MIRROR Command
 Select
objects with left mouse button.
 Terminate
object selection with Enter key
 Select the first point of mirror line:
 Indicate
 Select
the first point with mouse.
the second point of mirror line:
 Indicate
the second point with mouse.
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The MIRROR Command Sequence
 Delete
old objects <N> ?
 Type
“Y” to delete old objects
 “N” is the default (which does NOT delete old objects)
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The MIRROR Command Sequence
 Command:
MIRROR
 Select objects: 1 found
 Select objects: 1 found, 2 total
 Select objects: Terminate selection with Enter
 Specify
first point of mirror line:
 Specify second point of mirror line:
 Delete
source objects? [Yes/No] <N>:
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AutoCAD “Default” Choices
 Default
choices are always shown in
“chevrons”
 Example:
<N>
 Press [Enter]
to select the default.
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The ROTATE Command
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The ROTATE Command
 Design
changes often require that an object,
feature, or view be rotated.
 Use
the ROTATE command to change the
orientation of an object or group of objects.
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The ROTATE Command
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The ROTATE Command
 Access the
ROTATE command by:
 Command
Alias: RO
 or
 Toolbar:
Modify
 or
 Pull-down
menu: Modify
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The ROTATE Command
 Select
a base point with a pick.
 Enter a rotation angle with mouse.
A
negative rotation angle revolves the object clockwise.
A
positive rotation angle revolves the object
counterclockwise.
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The ROTATE Command Sequence
 Command:
ROTATE
 Current positive angle in UCS:
ANGDIR=counterclockwise ANGBASE=0
 Select objects: 1 found
 Select objects: 1 found, 2 total
 Select objects:
 Specify base point:
 Specify rotation angle or [Reference]:
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The ROTATE Command Sequence
 Rotation
 Counterclockwise
= positive rotation
 Clockwise = negative rotation
 By
default, AutoCAD angles start at 3 o'clock
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The SCALE Command
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The SCALE Command
 The

SCALE command lets you change the size of
an object
 or

a complete drawing.
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The SCALE Command
 The
SCALE command
 enlarges
or reduces the entire object proportionally.
 If associative
dimensioning is used, the
dimensions also change to reflect the new size.
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The SCALE Command – Scale Factor
 Specifying
the Scale Factor is the default option.
 Enter
a number to indicate the amount of enlargement
or reduction.
 To
double the scale, type “2”
 To half the scale, type “0.5”
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The SCALE Command Sequence
 Access the
SCALE command by:
 Command
Alias: SC
 or
 Toolbar:
Modify
 or
 Pull-down
menu: Modify
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The SCALE Command Sequence
 Command:
“SC” or “SCALE”
 Select objects
 Terminate
object selection with the [Enter] key.
 Select
a Base point:
 Enter the <Scale factor>/Reference:
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SCALE Command Sequence-Reference
 Command:
SCALE
 Select objects: 1 found
 Select objects:
 Terminate
object selection with [ENTER]
 Specify
base point:
 Specify scale factor or [Reference]: R
 Specify reference length <1>: 3
 Specify new length: 6
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Reference Option
 An
object can also be scaled by specifying an
new size in relation to an existing dimension.
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Reference Option
 The
Scale command changes all dimensions of
an object proportionately.
 If
you want to change only the width or length
of an object, use the STRETCH or LENGTHEN
command instead.
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The BREAK Command
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The BREAK Command
A
“gap” can be inserted in any object with this
command.
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The BREAK Command Sequence
 Access the
BREAK command by:
 Command
Alias: BR
 or
 Toolbar:
Modify
 or
 Pull-down
menu: Modify
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Break Command Sequence
 Command:
BREAK
 Select objects:
 Terminate
 Enter
second point (or F for first point)
 Typing
A
object selection with the [ENTER] key.
“F” allows you to re-specify the first point
break is inserted in the object.
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The FILLET Command
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FILLET Command
 Definition:
In mechanical drafting, an inside
rounded corner is called a fillet.
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FILLET Command
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FILLET Command
 The
FILLET command draws a rounded corner
between
 intersecting
lines
 OR
 non-intersecting
lines.
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FILLET Command
 Fillets
 The
are sized by radius
default radius is 0.5
A
new radius is specified first by typing “R” on the
prompt line for the Radius option
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FILLET Command
 Access the
FILLET command by:
 Command
Alias: F
 or
 Toolbar:
Modify
 or
 Pull-down
menu: Modify
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FILLET Command
 Command:
“F” or “FILLET”
 (TRIM
mode) Current fillet radius = 0.5
 Polyline/Radius/Trim/(Select first object):
 Enter
fillet radius:
 (enter

the fillet radius and press [Enter]
or
 press
[Enter] to accept the current value.
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FILLET Command
 Two
settings control the final appearance of
lines after using the FILLET command.
 The
TRIMMODE system variable and
 Trim option
 The
object segments that extend beyond the
fillet radius point lines may or may not be
trimmed.
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FILLET Command
 When
Trim mode is OFF,
 the
filleted objects are NOT CHANGED after the
fillet is inserted.
 (The corners remain).
 When
Trim Mode is ON
 the
corners are automatically extended to form a
smooth fillet.
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FILLET Command
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The CHAMFER Command
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Chamfer
 Definition:
A chamfer is a small angled
surface used to relieve a sharp corner.
 AutoCAD
defines a chamfer as any angled
corner on the drawing.
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Chamfer
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Chamfer
 The
size of a chamfer is determined by its
distances from the corners.
 Distances
from corner can be
 Equal
 Not
A
equal
45o chamfer
 is
the same distance from the corner in each
direction.
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Chamfer Command Sequence
 Access the
CHAMFER command by:
 Command
Alias: CHA
 or
 Toolbar:
Modify
 or
 Pull-down
menu: Modify
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Chamfer Command Sequence
 Command:
CHAMFER
 (TRIM
mode) Current chamfer
 Dist1 = 0.5000
 Dist2 = 0.5000
 Select
first line or
[Polyline/Distance/Angle/Trim/Method]
 Select second line:
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CHAMFER Command
 Select
first line or [Polyline/Distance/Angle/Trim
Method]
 You
must first set the Options for the Chamfer
command.
 Select
chamfer
 Select any one of the following modifying options
by typing the capitalized letter
P
– Polyline
 D – Distance
 A – Angle
 T – Trim method
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CHAMFER Command Options
 Polyline
- Use this option if you want to chamfer
all edges on a Polyline
 Distance - lets you set the chamfer distance for
each line from the corner
 Angle  uses
a chamfer distance on the first line
 applies a chamfer angle to determine the second line
chamfer.
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Chamfer Command Options
 Trim -
Enter this to set the Trim mode.
 If trim
is on,
 the
selected lines are trimmed or extended as required
from the corner before creating the chamfer line.
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The DTEXT Command
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The DTEXT Command
 DTEXT
is the dynamic text command.
 Causes
text to be displayed on the screen as you type.
 Creates single-line text
 Each line of text is a single object
 Most
useful for text items that require only one
line of text
 This text command is the MOST COMMONLY
USED command.
 NOT
MTEXT!
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The DTEXT Command Sequence
 Command:
DTEXT
 Current
text style: "Standard" Text height: 0.2000
 Specify start point of text or [Justify/Style]:
 Specify height <0.2000>:
 Specify rotation angle of text <0>:
 Enter text: this is text
 Enter text: this is text
 Enter text: hit the [Enter] key on a blank line to exit
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The MTEXT Command
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The MTEXT Command
 MTEXT
(MT)
 Creates
multiple line text
 Think “Wordprocessor”
 Use for Paragraph of text.
 Use for mixed types of text
 Bold
 Underline
 Italics
 Varied
fonts
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The ARRAY Command
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The ARRAY Command
 Some
designs require a rectangular or circular
pattern of the same object or objects.
 Example:
 Suppose
your drawing calls for 20 desks arranged
in 5 rows.
 You
could draw the desk once and copy it 19 times or
 You could use the ARRAY command.

Faster and easier
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The ARRAY Command
 A Rectangular Array
creates rows and columns
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The ARRAY Command
 A Polar
Array constructs a circular arrangement
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Rectangular Arrays
 Access the
ARRAY Command by:
 Command
Alias: AR
 Or
 Toolbar:
Modify
 Or
 Pull-down
Menu: Modify
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The ARRAY Command
 A Polar
Array constructs a circular arrangement
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Polar Arrays
 Command:
ARRAY
 Select objects: (select the objects)
 Select objects:

[Enter] to terminate selection
 Rectangular
 enter
or POlar array (R/P)<current>:
R or PO
 Base/<Specify
center point of array>: (pick the
center point of the array)
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The STRETCH Command
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The STRETCH Command
 The
SCALE command
 changes
the length and width of an object
proportionately.
 The
STRETCH command
 changes
only one dimension of an object.
 In
mechanical drafting, it is common to increase the
length of a part while leaving the diameter or width the
same.
 In architectural design, room sizes may be stretched to
increase the square footage.
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The STRETCH Command
 When
using STRETCH, you must select objects
by:
A
crossing window
 A crossing polygon
 If
you do not use a Crossing Window or a
Crossing Polygon, STRETCH will not work!
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The STRETCH Command
A
crossing window
 Is
drawn right-to-left
 Is green shaded
 Is dashed border
A
window
 Is
drawn left-to-right
 Is blue shaded
 Is solid border
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The STRETCH Command
 To
access the STRETCH command:
 Command
Alias: S
 Or
 Toolbar:
Modify
 Or
 Pull-down
Menu: Modify
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The CROSSING WINDOW
 To
use the Crossing window
 Type “C”
at the Select object: prompt
 or
 Drag
your selection window from right to left.
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The STRETCH Command
 The
placement of the edge of the Crossing
Window is important!
 The lines crossed by the edge of the Crossing
Window will be stretched.
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The STRETCH Command
 Select
only the portion of the object to be
stretched.
 If
 Pick
you select the entire object, STRETCH acts like MOVE.
a basepoint.
 This
is the location from which the object will be
stretched.
 Pick
a new position for the base point.
 As
you move the screen cursor, the object is
stretched or compressed.
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STRETCH Command Sequence
 Command:
stretch
 Select
objects to stretch by crossing-window or
crossing-polygon...
 Select objects: use crossing window (!)
 Specify opposite corner: 1 found
 Select objects:

Terminate object selection with [ENTER] key
 Specify
base point or displacement:
 Specify second point of displacement:
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1
2
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1
2
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The OFFSET Command
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The OFFSET Command
 The
OFFSET command is used to draw
 Concentric
circles
 Concentric arcs
 Concentric curves
 Concentric Polylines.
 Parallel lines.
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The OFFSET Command
 Access the
OFFSET command by:
 Command
Alias: O
 OR
 Toolbar:
Modify
 OR
 Pull-down
Menu: Modify
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The OFFSET Command
 Select
Object
 Type an OFFSET distance
 Pick side that offset object is to be placed
 or
 pick
a point for the parallel object to be drawn
through.
 The
last offset distance entered is shown in
brackets in the Command area.
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The OFFSET Command
 Think
 “This
object”
 On
 “This
side”
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The TRIM Command
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The TRIM Command
 The
TRIM command cuts:
 lines
 circles
 arcs
 ellipses
 splines
 xlines
 Rays
 At
a specified Cutting Edge
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The TRIM Command
 Access the
TRIM command by:
 Command
Alias: TR
 or
 Toolbar:
Modify
 or
 Pull-down
menu: Modify
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The TRIM Command
 TRIM
requires a “cutting edge”.
 The cutting edge can be:
a
line
 an arc
 text
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The TRIM Command
 When
you TRIM objects,
 the
first prompt asks you for a cutting edge.
 If you press Enter, AutoCAD will specify all objects
as potential cutting edges.
 Then, select the part of the object that you want
to trim and AutoCAD automatically trims it at the
closest possible cutting edge.
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The TRIM Command
 1.
Enter TRIM command
 2. At the Select cutting edges … Select objects or
<select all>: prompt, press Enter.
 3. Select the object(s) to trim.
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The TRIM Command
 An
implied intersection is the point where two
or more objects would meet if they were
extended.
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The TRIM Command
 AutoCAD
can trim objects to an implied
intersection, even if the objects do not
intersect.
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The TRIM Command
EXTEND must be “ON”
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The TRIM Command Sequence

Command: Trim
 Current settings: Projection=UCS Edge=Extend
Select cutting edges ...
 Select objects: 1 found
 Select objects:

 Terminate object

selection with [ENTER] key.
Select object to trim or [Project/Edge/Undo]:
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The TRIM Command Options






Command: TRIM
Current settings: Projection=UCS Edge=Extend
Select cutting edges ...
Select objects: 1 found
Select objects:
Select object to trim or [Project/Edge/Undo]: e



Enter an implied edge extension mode [Extend/No extend] <Extend>:
Select object to trim or [Project/Edge/Undo]:
Select object to trim or [Project/Edge/Undo]:
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The EXTEND Command
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The EXTEND Command
 The
EXTEND command is used to lengthen
existing
 lines
 arcs
 rays
 open
polylines
 This
command is the opposite of the TRIM
command.
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The EXTEND Command
 To
use the EXTEND command:
 Command
Alias: EX
 OR
 Toolbar:
Modify
 OR
 Pull-down
Menu: Modify
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The EXTEND Command
 The
command format is similar to TRIM.
 You
are asked to select boundary edges, as
opposed to cutting edges.
 Boundary
edges
 are objects
such as
 Lines
 Arcs
 Text
 to
which the selected objects are extended.
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The EXTEND Command
 You
can also EXTEND an object to an implied
intersection.
 Select
the Edge option.
 When you enter the Edge option, the choices are
Extend and No extend.
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The EXTEND Command
 When
Extend is active
 the
boundary edge object is checked to see if it
intersects when extended.
 If an intersection does exist, the implied
intersection point can be used as the boundary for
the object to be extended.
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The EXTEND Command
 Command:
EX or EXTEND
 Current settings: Project = UCS. Edge=None
 Select boundary edges…
 Select objects: (pick the boundary edge)
 Select objects [Enter]
 Select object to extend or [Project/Edge/Undo]: E
 Enter implied edge extension or mode [Extend/No
extend] <No extend>: E
 Select object to extend or [Project/Edge/Undo]:
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