1. Basic Editing Techniques

2. Objectives Understand the use of different editing command
Move objects
Copy objects
Mirror objects
Array objects
Rotate objects
Scale objects
Stretch objects

3. Objectives Understand the use of different editing command Parallel
Trim and Extend objects
Fillet
Chamfer
Break
Join
Divide and Measure

4. Objectives Understand the use of different editing command
Entering Text
Entering text in angle
Editing text
Drawing Dimension
Hatching
Drawing Isometric

5. Using the MOVE Command
The ability to copy and move objects on the screen is one of the great advantages of working on a CAD system. It can be said that CAD is to drafting as word processing is to typing. Nowhere is this analogy more appropriate than in the cut-and-paste capacities that the COPY and MOVE commands give you.
Figure 4-5

6. Moving Objects
The MOVE command moves objects a user-specified distance and angle
You can move objects by:
Using mouse point picks
Using direct distance
Using the Displacement option

7. Using the MOVE Commands
When selecting the base point it does not have to be on or near the object you are moving or copying. Any point will do, as long as you can use it to show how you want your objects moved. This may seem strange at first, but it will soon become natural. Of course, you can choose a point on the object if you wish. With a circle, the center point may be convenient.
Moving the circle with
Ortho on
Figure 4-6

8. Using the MOVE Commands
Turning Ortho Mode off allows you to move an object diagonally.
Figure 4-7

9. Moving by Typing a Displacement
There is one more way to use the MOVE command. Instead of showing AutoCAD a distance and direction, you can type a horizontal and vertical displacement. For example, to move the circle 3 units to the right and 2 units up, you would use the following procedure (there is no autoediting equivalent for this procedure):
1. Pick an object.
2. Type m <Enter> or pick the Move tool.
3. Type 3,2 <Enter> in response to the prompt for base point or displacement.
4. Press <Enter> in response to the prompt for a second point.

10. Using the COPY Command
The COPY command works much like the MOVE command. You can make as many copies as you wish in each use of the copy command.
Copying a circle
Figure 4-9

11. Using the COPY Command
A general procedure for using the COPY command is:
1. Pick the Copy tool from the Modify panel of the ribbon.
2. Define a selection set. (Steps 1 and 2 can be reversed if noun/verb selection is enabled.)
3. Choose a base point.
4. Choose a second point.
5. Choose another second point or press <Enter> to exit the command.
Figure 4-10

12. Mirroring Objects
The MIRROR command creates a mirror image of objects about a mirror axis line defined by two user-supplied endpoints
You will have the choice to either erase the original object or leave it in the drawing

13. Mirroring Objects

14. Mirroring Objects

15. Using the ARRAY Command—Rectangular Arrays
The ARRAY command gives you a powerful alternative to simple copying. An array is the repetition of an image in matrix form. This command takes an object or group of objects and copies it a specific number of times in mathematically defined, evenly spaced locations. There are two types of arrays. Rectangular arrays are linear and defined by rows and columns. Polar arrays are angular and based on the repetition of objects around the circumference of an arc or circle. The lines on the grid are an example of a rectangular array; the radial lines on any circular dial are an example of a polar array.

16. Using the ARRAY Command—Rectangular Arrays
Pick the Array tool from the Modify panel on the ribbon, as shown in Figure This opens the Array dialog box shown in Figure 4-13.
Figure 4-12
The Rectangular Array radio button is selected at the top left of the dialog box, as it should be by default.
Figure 4-13

17. Using the ARRAY Command—Rectangular Arrays
AutoCAD builds rectangular arrays up and to the right.
This is consistent with the coordinate system, which puts positive values to the right on the horizontal X-axis and upward on the vertical Y-axis. Negative values can be used to create arrays in other directions.
Figure 4-14

18. Creating Center Marks
The Center Mark is the simplest of all dimension objects.
Center mark
Figure 4-15

19. Rotating Objects
The ROTATE command rotates objects a user-specified rotation angle around a user-specified base point
You can use the Ortho Mode or Polar Tracking to quickly rotate object(s) at predefined angles

20. Rotating Objects

21. Rotating Objects

22. Rotating Objects

23. Scaling Objects
The SCALE command scales objects a user-specified scale factor about a user-specified point
Objects can be scaled by:
Using the mouse
Entering a scale factor
Specifying a reference

24. Scaling Objects

25. Scaling Previously Drawn Entities
When you enter a scale factor, all lengths, heights, and diameters in your set are multiplied by that factor and redrawn accordingly. Scale factors are based on a unit of 1. If you enter 0.5, objects are reduced to half their original size. If you enter 2, objects become twice as large.
Object
scaled 1.12
Original
Object
Object
scaled .75
Original
Object
Object
scaled .50
Original
Object
Base Point
on the Object
Base Point
on the Object
Base Point
off the Object

26. Scaling by Reference
This option can save you from doing the arithmetic to figure out scale factors. It is useful when you have a given length and you know how large you want that length to become after the scaling is done.
General Procedure:
1.Enter the SCALE command.
2. Select the lines.
3. Pick a base point.
4. Type r <Enter> or right-click and select Reference from the shortcut menu.
5. Type 2 <Enter> for the reference length.
6. Type 2.33 <Enter> for the new length.

27. Stretching Objects
The STRETCH command moves or stretches objects a user-supplied distance and angle using the Crossing Window or Crossing Polygon selection option
The key to this command is that it moves only endpoints and vertices that lie inside the crossing selection

28. Stretching Objects

29. Stretching Objects

30. Stretching Objects

31. Parallel copy passing through a point
Do one of the following:
Choose Modify > Parallel.
On the Modify toolbar, click the Parallel tool ().
Type parallel and then press Enter.
In the prompt box, choose Through Point.
Select the entity to copy.
Specify the point for the entity to pass through.

32. Trimming and Extending Objects
Trimming and extending is the process of lengthening or shortening objects using AutoCAD objects as the boundaries
When using the TRIM command, cutting edges determine the stopping boundaries of trimmed objects
When using the EXTEND command, boundary edges determine the edge where the object is extended

33. Shortening Objects with the TRIM Command
Horizontal lines crossing circle
Trimming lines at circle
Figure 6-16
Figure 6-17

34. Shortening Objects with the TRIM Command
Trimmed lines and circle
Figure 6-17

35. Extending Objects with the EXTEND Command
As with the TRIM command, any of the usual selection methods work. there is an option for selecting all objects.
Drawing the vertical boundary line
Extending the horizontal lines
Figure 6-21
Figure 6-20

36. Editing Corners Using Fillet
The Multiple Option - Allows you to create multiple fillets without leaving the FILLET command.
Multiple fillets on corners
Figure 3-13

37. Editing Corners Using Chamfer
Entering the same value for both the first and second distance will give you a chamfer cut evenly on both sides.
If you want an asymmetrical chamfer, enter a different value for the second distance.
AutoCAD also gives you the option to enter a distance and an angle.
Figure 3-16

38. Break
With the BREAK command you can break a selected object into separate objects.
The Break tool can also be used to shorten lines by picking the second point of the “gap” beyond the end of the line.

39. Joining Multiple Objects
The JOIN command does the opposite of the BREAK command by:
Closing the gap between objects
Converting multiple objects into a single object

40. Divide and Measure
The MEASURE command places points at a specified distance along an object
The DIVIDE command places points so that an object is divided into a specified number of segments

41. Entering Text on an Angle
The text is drawn on the screen at a 45° angle, and the cursor moves down to the next line.
Notice that the text cursor is still at the specified angle.
Figure 7-4

42. Entering Multiline Text Using MTEXT
The MTEXT command allows you to create multiple lines of text in a text editor and position them within a defined window in your drawing. Like TEXT, MTEXT has nine options for text justification and its own set of character codes.
Figure 7-6

43. Editing Text in Place with DDEDIT and MTEDIT
There are several ways to modify text that already exists in your drawing.
You can change wording and spelling as well as properties such as layer, style, and justification.
For simple changes in the wording of text, use the DDEDIT or MTEDIT command, accessed from the Modify menu.
For property changes, use the Quick Properties panel.
Because MTEXT creates multiple lines of text as a group, you cannot select a single line of text as the entire group is selected.

44. Editing Text in Place with DDEDIT and MTEDIT
A general procedure for editing text is:
1. Select the text you want to edit.
2. Right-click to open the shortcut menu.
3. Select Edit or Mtext Edit from the shortcut menu.
4. Edit text.
5. If necessary, click OK.

45. Editing Text in Place with DDEDIT and MTEDIT
It is most efficient to select the text first and then use the shortcut menu to enter commands and select options.
Shortcut menu
Adding text
Figure 7-10
Figure 7-9

46. Dimension Style Manager
Here there are seven tabs that allow us to make many changes in dimension lines, symbols and arrows, text, fit, primary units, alternate units, and tolerances.
Figure 8-6

47. Primary Units tab
There are adjustments available for linear and angular units. The lists under units and angles are similar to the lists used in the Drawing Units dialog box.
Figure 8-7

48. Drawing Linear DIMENSIONS DIMLINEAR
A general procedure for drawing linear dimensions is:
1. Pick the Linear tool from the Dimensions panel of the ribbon.
2. Select an object or show two extension line origins.
3. Show the dimension line location.

49. Using the HATCH Command
Automated hatching is another immense time-saver.
AutoCAD has two basic methods of hatching. In one method, you select a point within an area to be hatched, and AutoCAD searches for the nearest boundary surrounding the point. In the other method, you specify the boundaries themselves by selecting objects.

50. Using Isometric SNAP
To begin drawing isometrically, you need to switch to the isometric snap style and the 2D model space grid. You find the grid and crosshairs behaving in ways that might seem odd at first, but you quickly get used to them.
A general procedure for entering isometric snap mode is:
1. Right-click the Snap Mode or Grid Display button on the status bar.
2. Select Settings.
3. In the Drafting Settings dialog box, select the Isometric snap radio

51. Using Isometric SNAP
Isometric grid
Figure 10-1

52. Using Isometric SNAP
Isometric boxes
Figure 10-2

53. Switching Isometric Planes
<F5> key (or <Ctrl> + e).
Isometric planes
Figure 10-3
Isometric crosshairs
Figure 10-4

54. Using Copy and Other Edit Commands
Drawing connecting lines
Figure 10-8