1. Basic Editing Commands
Sacramento City College
EDT 310
EDT Basic Editing Commands

2. EDT 310 - Basic Editing Commands
Objectives
EDT Basic Editing Commands

3. 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
EDT Basic Editing Commands

4. “Modify” Commands Location
Toolbar
“Modify”
Pull-down Menu
EDT Basic Editing Commands

5. “Modify” Commands Location
Pull-down Menu
“Modify”
EDT Basic Editing Commands

6. EDT 310 - Basic Editing Commands

7. EDT 310 - Basic Editing Commands

8. EDT 310 - Basic Editing Commands
The MOVE Command
EDT Basic Editing Commands

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The MOVE Command
Use MOVE to change the location of objects.
EDT Basic Editing Commands

10. EDT 310 - Basic Editing Commands
The MOVE Command
Access the MOVE command by:
Command Alias: M or
Toolbar: Modify
Pull-down menu: Modify
EDT Basic Editing Commands

11. EDT 310 - Basic Editing Commands

12. 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>:
EDT Basic Editing Commands

13. EDT 310 - Basic Editing Commands
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.
EDT Basic Editing Commands

14. EDT 310 - Basic Editing Commands
The MOVE Command
Don’t forget to terminate your selection with the [Enter] key !
EDT Basic Editing Commands

15. EDT 310 - Basic Editing Commands
COPY Command
EDT Basic Editing Commands

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The COPY Command
Use COPY to make one or more copies of an existing drawing object.
EDT Basic Editing Commands

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The COPY Command
Access the COPY command by:
Command Alias: CO or
Toolbar: Modify
Pull-down menu: Modify
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19. EDT 310 - Basic Editing Commands
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.
EDT Basic Editing Commands

20. EDT 310 - Basic Editing Commands
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!
EDT Basic Editing Commands

21. The COPY 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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22. EDT 310 - Basic Editing Commands
The MIRROR Command
EDT Basic Editing Commands

23. EDT 310 - Basic Editing Commands
The MIRROR Command
Objects can be mirrored with this command.
You 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.
EDT Basic Editing Commands

24. EDT 310 - Basic Editing Commands
The MIRROR Command
EDT Basic Editing Commands

25. EDT 310 - Basic Editing Commands
The MIRROR Command
Access the MIRROR command by:
Command Alias: MI or
Toolbar: Modify
Pull-down menu: Modify
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27. EDT 310 - Basic Editing Commands
The MIRROR Command
Select objects with left mouse button.
Terminate object selection with Enter key
Select the first point of mirror line:
Indicate the first point with mouse.
Select the second point of mirror line:
Indicate the second point with mouse.
EDT Basic Editing Commands

28. The MIRROR Command Sequence
Delete old objects <N> ?
Type “Y” to delete old objects
“N” is the default (which does NOT delete old objects)
EDT Basic Editing Commands

29. 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>:
EDT Basic Editing Commands

30. AutoCAD “Default” Choices
Default choices are always shown in “chevrons”
Example: < N >
Press [Enter] to select the default.
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31. EDT 310 - Basic Editing Commands
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
EDT Basic Editing Commands

34. EDT 310 - Basic Editing Commands
The ROTATE Command
Access the ROTATE command by:
Command Alias: RO or
Toolbar: Modify
Pull-down menu: Modify
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36. EDT 310 - Basic Editing Commands
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.
EDT Basic Editing Commands

37. 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]:
EDT Basic Editing Commands

38. The ROTATE Command Sequence
Rotation
Counterclockwise = positive rotation
Clockwise = negative rotation
By default, AutoCAD angles start at 3 o'clock
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39. EDT 310 - Basic Editing Commands
The SCALE Command
EDT Basic Editing Commands

40. EDT 310 - Basic Editing Commands
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.
EDT Basic Editing Commands

42. 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”
EDT Basic Editing Commands

43. The SCALE Command Sequence
Access the SCALE command by:
Command Alias: SC or
Toolbar: Modify
Pull-down menu: Modify
EDT Basic Editing Commands

44. EDT 310 - Basic Editing Commands

45. 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:
EDT Basic Editing Commands

46. 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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47. EDT 310 - Basic Editing Commands
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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49. EDT 310 - Basic Editing Commands
The BREAK Command
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The BREAK Command
A “gap” can be inserted in any object with this command.
EDT Basic Editing Commands

51. The BREAK Command Sequence
Access the BREAK command by:
Command Alias: BR or
Toolbar: Modify
Pull-down menu: Modify
EDT Basic Editing Commands

52. EDT 310 - Basic Editing Commands

53. Break Command Sequence
Command: BREAK
Select objects:
Terminate object selection with the [ENTER] key.
Enter second point (or F for first point)
Typing “F” allows you to re-specify the first point
A break is inserted in the object.
EDT Basic Editing Commands

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55. EDT 310 - Basic Editing Commands
The FILLET Command
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56. EDT 310 - Basic Editing Commands
FILLET Command
Definition: In mechanical drafting, an inside rounded corner is called a fillet.
EDT Basic Editing Commands

57. EDT 310 - Basic Editing Commands
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 are sized by radius
The default radius is 0.5
A new radius is specified first by typing “R” on the prompt line for the Radius option
EDT Basic Editing Commands

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61. EDT 310 - Basic Editing Commands
FILLET Command
Access the FILLET command by:
Command Alias: F or
Toolbar: Modify
Pull-down menu: Modify
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63. EDT 310 - Basic Editing Commands
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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64. EDT 310 - Basic Editing Commands
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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65. EDT 310 - Basic Editing Commands
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 equal
A 45o chamfer
is the same distance from the corner in each direction.
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71. EDT 310 - Basic Editing Commands

72. Chamfer Command Sequence
Access the CHAMFER command by:
Command Alias: CHA or
Toolbar: Modify
Pull-down menu: Modify
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74. Chamfer Command Sequence
Command: CHAMFER
(TRIM mode) Current chamfer
Dist1 =
Dist2 =
Select first line or [Polyline/Distance/Angle/Trim/Method]
Select second line:
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75. EDT 310 - Basic Editing Commands
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
EDT Basic Editing Commands

76. 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.
EDT Basic Editing Commands

77. 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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82. The DTEXT Command Sequence
Command: DTEXT
Current text style: "Standard" Text height:
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: hit the [Enter] key on a blank line to exit
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The MTEXT Command
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84. EDT 310 - Basic Editing Commands
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
EDT Basic Editing Commands

85. The ARRAY Command (ARRAYCLASSIC)
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86. EDT 310 - Basic Editing Commands
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 ARRAYCLASSIC Command by:
Command Alias: ARRAYCLASSIC Or
Toolbar: Modify
Pull-down Menu: Modify
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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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99. EDT 310 - Basic Editing Commands
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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100. EDT 310 - Basic Editing Commands
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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101. EDT 310 - Basic Editing Commands
The STRETCH Command
To access the STRETCH command:
Command Alias: S Or
Toolbar: Modify
Pull-down Menu: Modify
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103. EDT 310 - Basic Editing Commands
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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104. EDT 310 - Basic Editing Commands
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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105. EDT 310 - Basic Editing Commands
The STRETCH Command
Select only the portion of the object to be stretched.
If you select the entire object, STRETCH acts like MOVE.
Pick 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.
EDT Basic Editing Commands

106. 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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107. EDT 310 - Basic Editing Commands2
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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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114. EDT 310 - Basic Editing Commands
The OFFSET Command
Access the OFFSET command by:
Command Alias: O OR
Toolbar: Modify
Pull-down Menu: Modify
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116. EDT 310 - Basic Editing Commands
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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117. EDT 310 - Basic Editing Commands
The OFFSET Command
Think
“This object” On
“This side”
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120. EDT 310 - Basic Editing Commands
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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122. EDT 310 - Basic Editing Commands
The TRIM Command
Access the TRIM command by:
Command Alias: TR or
Toolbar: Modify
Pull-down menu: Modify
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124. EDT 310 - Basic Editing Commands
The TRIM Command
TRIM requires a “cutting edge”.
The cutting edge can be:
a line
an arc
text
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125. EDT 310 - Basic Editing Commands
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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126. EDT 310 - Basic Editing Commands
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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127. EDT 310 - Basic Editing Commands
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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129. EDT 310 - Basic Editing Commands
The TRIM Command
EXTEND must be “ON”
EDT Basic Editing Commands

130. 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]:
EDT Basic Editing Commands

131. 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]:
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The EXTEND Command
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133. EDT 310 - Basic Editing Commands
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
Pull-down Menu: Modify
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135. EDT 310 - Basic Editing Commands
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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136. EDT 310 - Basic Editing Commands
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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137. EDT 310 - Basic Editing Commands
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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138. EDT 310 - Basic Editing Commands
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]:
EDT Basic Editing Commands