Home > CAD Drafting Tutorials > AutoCAD 2004 for Architects > Using Object Snaps
AutoCAD 2004


01-AutoCAD and Architecture
02-The GUI and Windows
03-Customizing the Interface
04-Drawing Lines
05-Starting a New Drawing
06-Saving a Drawing

Practice Drawing

07-Drawing Straight Lines
08-Modify Commands
09-Zoom Commands
10-Pan and Zoom Features
11-Selecting Objects/Entities
13-Develop Drawing Style

Creating an Architectural Drawing - Method A

14-Sketch File
15-Format Units and Point of Origin
16-Drawing Exact Length Lines
17-Save and Offset Lines
18-Copy Lines and Object Snap
19-Using Object Snaps
20-Save and Trim Command
21-Trim and Undo
22-Fillet Command
23-UCS Icon and Distance Command
24-Circle and Move Command
25-Line and Trim Command
26-Drawing Comments and Close File

Printing a Drawing - Part I

Basic Printing Features
Review Printing and the Scale Factor

Creating an Architectural Drawing - Method B

Common Steps and Regen Command
Modifying Lines
Extend Command
Mirror Command
Rotate Command

Introduction to Layers

Drawing a Kitchen Table
Introduction to Layers
Creating Entities and Layers
Layer Properties
Modifying Entities and Layers
Polar Tracking and Mirror Command
Express Tools: Layers
List Command and Layer Standards

Drawing with Layers and Linetypes

Creating a Sketch and Drawing a Kitchen
Creating Layers
Drawing Techniques
Continue Drawing and Modifying
Drawing the Window
Drawing the Door
Drawing the Cabinets
Drawing the Refrigerator
Drawing the Sink
Drawing the Stove


Formatting the Linetype
Modifying Lines
Autosave Feature and Closing the Drawing

Hatch Patterns

Adding a Hatch Pattern to the Floor
Adding a Hatch Pattern to the Walls
Modifying a Hatch Pattern
Using Snapbase when Hatching

The Architectural Scale Factor

What is the Scale Factor?
Calculating the Scale Factor - Three Methods
Calculating the Scale Factor - Two Methods
The Scale Factor Chart


Preparing a Sketch and Formatting Text
Drawing Text Using the Scale Factor
Modify Text Location
Object Snap Tracking
Text Properties
Dtext and Mtext


Anatomy of a Dimension
Formatting a Dimension Style
Entering Values for Dimension Style
Entering Values Continued
Drawing Dimension Lines
Editing Dimension Lines
Continuous Dimensions
Creating a New Dimension Style
Dimensioning Tips

Creating Blocks and Wblocks

What are Blocks and Wblocks?
Creating a Block
Inserting a Block
Redefine a Block
Creating a Wblock
Inserting a Wblock
Purging Block Definitions
Using DesignCenter to Insert Blocks/Wblocks


Creating Polylines
Creating a Border Using Polylines
Adding Text
Stretch Command

Model Space and Paper Space

Purpose of Model Space and Paper Space
Composing the Final Drawing - Model Space
Composing the Final Drawing - Paper Space
Psltscale System Variable

Printing a Drawing - Part II

Printing the Final Drawing Using Plot Styles
Printing Options
Model Space and Paper Space Printing


Final Words on AutoCAD

Using Object Snaps

CAD Tutorials: AutoCAD 2004 for Architects - Main Page

Object snaps constrain point specification to exact locations, such as a midpoint or an intersection, on existing objects. Using object snaps is a quick way to locate an exact position on an object without having to know the coordinate or draw construction lines. For example, you can use an object snap to draw a line to the center of a circle or to the midpoint of a polyline segment. You can specify an object snap whenever AutoCAD prompts for a point.

If AutoSnap™ is turned on, AutoCAD displays a marker and a tooltip whenever you move the target box over a snap point. This feature provides a visual clue that indicates which object snaps are in effect.

There are a variety of ways to turn on object snaps. If you choose an individual object snap on the toolbar or enter its name on the command line, the snap stays in effect only for the next point you specify. You also can set running object snaps, that is, one or more object snaps that remain in effect as you work. Choose None to turn off both single and running object snaps.

Snap to a Single Point

When you specify an object snap, the cursor changes to an object snap target box. When you select an object, AutoCAD snaps to the eligible snap point closest to the center of the target box, or aperture.

The object snap buttons are located on the Object Snap flyout on the Standard toolbar.

Use Running Object Snaps

If you need to use the same object snap repeatedly, you can set it as a running object snap, which means it stays on until you turn it off. For example, you might set Center as a running object snap if you need to connect the centers of a series of circles with a line. As with single object snaps, the aperture, or target box, indicates that an object snap is on and identifies the selection area. You can change the size of the target box.

When you turn on multiple running object snaps, AutoCAD uses the object snap most appropriate to the object you select. If two potential snap points fall within the selection area, AutoCAD snaps to the eligible point closest to the center of the target box.

To snap to a geometric point on an object

  1. At the prompt for a point, hold down SHIFT and right-click in the drawing area. Then choose the object snap you want to use.
  1. Move your cursor over the desired snap location.

If AutoSnap is on, your cursor automatically locks onto the snap location you selected, and a marker and tooltip indicates the snap point.

  1. Select an object.

The cursor snaps to the eligible location closest to your selection. Press SHIFT and right-click (for object snap menu).

To set running object snaps

  1. From the Tools menu, choose Drafting Settings.
  1. In the Drafting Setting dialog box, Object Snap tab, select the object snaps you want to use.
  2. To change the size of the target box, choose Options.
  3. In the Options dialog box, Drafting tab, drag the slider bar under Aperture Size.
  1. Choose OK to exit each dialog box.

Press SHIFT and right-click to display the object snap menu.

To turn on and turn off running object snaps as you work

  • On the status bar, click Osnap.

If running object snaps have been set, the previous settings are turned on or off. You can also press F3 to toggle running object snaps.

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Using Object Snaps